13 best gps atomic clocks

GPS atomic clocks are highly precise timekeeping devices used in the Global Positioning System (GPS) to ensure accurate location and timing information. Here's what you need to know about GPS atomic clocks:

  1. Atomic Clock Technology: Atomic clocks are the most accurate timekeeping devices available. They operate based on the vibrations of atoms, particularly cesium or rubidium atoms, which have extremely stable resonant frequencies. This stability allows atomic clocks to maintain time with incredible accuracy.

  2. Role in GPS: GPS satellites orbiting the Earth carry atomic clocks onboard. These clocks continuously emit signals that include the precise time at which the signal was transmitted. The signals are received by GPS receivers on the ground, which use the time information to calculate the distance between the receiver and the satellite.

  3. Trilateration: GPS receivers use a process called trilateration to determine their exact location on Earth's surface. To do this, they need accurate time information from at least four GPS satellites. By measuring the time it takes for signals from these satellites to reach the receiver, the GPS receiver can calculate the distance to each satellite and pinpoint its location.

  4. Precise Timing: GPS atomic clocks are crucial because even tiny discrepancies in timekeeping can result in significant errors in calculating positions. The atomic clocks onboard GPS satellites are synchronized with Coordinated Universal Time (UTC), the international standard for timekeeping.

  5. Relativity Effects: GPS atomic clocks experience relativistic effects due to their high orbital speeds and the gravitational field of the Earth. According to Einstein's theory of relativity, time passes more slowly for objects in motion and in strong gravitational fields.To compensate for these effects, the clocks on GPS satellites are adjusted to run slightly faster than ground-based atomic clocks.

  6. Redundancy: The GPS system has built-in redundancy, with multiple satellites in orbit equipped with atomic clocks. This redundancy ensures that even if some satellites fail or experience issues, there are enough functional satellites to provide accurate positioning and timing information.

  7. Continuous Monitoring and Maintenance: The U.S. Department of Defense, which operates the GPS system, continuously monitors the performance of the atomic clocks on GPS satellites and makes adjustments as needed to maintain accuracy.

  8. Applications: While GPS was originally developed for navigation and positioning, its applications have expanded to include precise timing for various industries and technologies. It is used in telecommunications, financial transactions, power grid synchronization, and more.

  9. Kindle Ebooks and Kindle Store: While GPS atomic clocks themselves are not directly related to Kindle ebooks or the Kindle Store, they indirectly support the operation of devices like Kindles by providing accurate time and location information for services and apps that rely on GPS technology.

In summary, GPS atomic clocks are essential components of the Global Positioning System, providing highly accurate timekeeping to enable precise location determination and navigation. Their role is critical in various applications, including GPS-enabled devices like Kindles.

Below you can find our editor's choice of the best gps atomic clocks on the market
  

Sharp Atomic Desktop Clock with Color Display - Atomic Accuracy - Easy to Read Screen with Calendar & Day of Week Time/Date Display - Auto Set Digital Dual Alarm Clock - Perfect for Nightstand or Desk

Sharp

Based on 955 reviews Check latest price
  • COLOR ATOMIC DUAL ALARM CLOCK - Accurate to the Second! The Atomic Clock has a built in receiver that automatically synchronizes itself with the WWVB radio broadcast by the US Government’s National Institute of Standards and Technology (NIST) in Fort Collins, Colorado. The Atomic Clock will always be accurate to within on second as it receives daily WWVB updates.
  • COLOR CALENDAR & DAY OF WEEK DISPLAY - Always know what day of the week it is with a quick glance. The clock displays the calendar and the day of the week. Using the Snooze/Dimmer switch on top of the display, you can easily adjust the display brightness to your liking.
  • EASY TO SET DUAL ALARM - Set alarm for two people, or set one alarm for weekdays and the other for weekend!. Snooze/Dimmer Switch is simple to use and on top of the display.
  • "NO WORRY" BATTERY BACK-UP - There is a "No Worry" battery back-up option (requires 2 x AAA battery, sold separately), that will allow the alarm to go off, even if the power goes out. The battery back-up stores the time and alarm settings if the power is interrupted. During battery back-up the clock’s display will not be lit. Once power is restored, the display will re-light.
  • VARIABLE BACKLIGHT ON DEMAND - Press the snooze button on top of the clock to activate the 3-Step Dimmer Control, illuminating the whole display for 5 seconds. The backlight will also illuminate when the alarm sounds.

User questions & answers

Question: How do you increase the sound of the alarm
Answer: There is no volume control, if you feel something is wrong with the clock's alarm please reach out to customer service at [email protected] for warranty information.
Question: How do I change the time to regular time vs military time? When I set the clock it did not have the “pm” setting
Answer: Toggle 12 and 24 hour time by pressing the "12/24 WAVE" button.
Question: can this be placed anywhere or does it have to be in a window
Answer: This clock does not have to be near a window at all times but this does help during initial set up for connection to the atomic signal.
Question: Is this clock primarily to be used via standard AC power? I note that it has optional (?) battery backup
Answer: This clock is electric operated; the battery backup does not power the clock. The battery backup is used for storing the time and alarm settings if the power is interrupted. During battery backup the clock’s display will not be lit. Once the power is restored the display will re-light.

Product features

Easy to Read Color Display - Easy to Use - Atomic Accuracy

Color Calendar and Day of Week Display - Always know what day of the week it is with a quick glance. The clock displays the calendar and the day of the week. Using the Snooze/Dimmer switch on top of the display, you can easily adjust the display brightness to your liking.

Never Needs Setting -Easy to Read Color Display with Date and Day of the Week Display

- The Sharp Color Atomic Wall Clock has a built in receiver that automatically synchronizes itself with the WWVB radio broadcast by the US Government ‘s National Institute of Standards and Technology (NIST) in Fort Collins, Colorado. The Sharp Atomic Clock will always be accurate to within one second as it receives daily WWVB updates.

- Calendar and Day of Week ColorDisplay - Always know what day of the week it is with a quick glance. The clock displays the calendar and the day of the week.

- 3-Step Dimmer Control for Variable Backlight Control allows you to illuminate the display to your desired brightness.

Sharp (SPC569) - East to Read Color Backlit Display

Always know what day of the week it is with a quick glance. The clock displays the calendar and the day of the week. Using the Snooze/Dimmer switch on top of the display, you can easily adjust the display brightness to your liking.

Simple Easy to Use Controls

Clean, elegant design that will fit into any decor. Controls are easy to use and are on the back of the clock to give a clean simple look to any room.

Perfect Size for Bedroom, Office , or Living Room

Perfect size clock will fit almost anywhere , but is still easy to see and use with the elegant color display.

SHARP - A Name You Can Trust.

Sharp has been making quality alarm clocks for over 25 years and is the largest suppler of Retail Alarm Clocks in the United States with over 61,000,000 sold. Millions trust us with helping them start their day and staying on track.

Sharp Atomic Clock - Atomic Accuracy - Never Needs Setting! - Jumbo 3" Easy to Read Numbers - Indoor/ Outdoor Temperature Display with Wireless Outdoor Sensor - Battery Powered - Easy Set-Up!!

Sharp

Based on 2 reviews Check latest price
  • Atomic Accuracy: The Atomic clock has a built-in receiver that automatically synchronizes itself with the WWVB radio broadcast by the US Government’s National Institute (NIST) in Fort Collins, Colorado. The Atomic Clock will always be accurate to within one second as it receives daily WWVB updates.
  • Wireless Outdoor Sensor: The Wireless outdoor sensor (included) transmits the outdoor temperature to the Atomic Wall Clock. The sensor can be placed anywhere within 100ft of the receiving unit. The wireless technology means no wire installation is necessary.
  • Jumbo 3” Tall LCD Time Display - Easy to Read, Easy to Use, Easy to Set up - Use as either a wall clock, or as a desk clock with integrated stand. Perfect for anyplace in your home.
  • Displays indoor and outdoor temperature - Displays calendar and day of week
  • Battery powered: Main unit 3 x AA batteries - Sensor 2 x AAA batteries (not included)

User questions & answers

Question: does it make a difference if you put the batteries in the clock before the outside unit
Answer: I couldn’t get that part working on mine
Question: What are the dimensions of the clock
Answer: HI, Thank you for reaching out. The dimensions are 8.75" across x 7.9" tall x .5" wide. Thanks, The Clock Shop
Question: Our clock suddenly stopped showing correct outside temperature. Does anyone know how I can fix it
Answer: I have the same clock with the same problem. The sensor worked for a couple of weeks and then just stopped. Company has removed the ability to leave a message and does not answer this number. I have not been able to contact them or even find an address, email or physical, to contact them in writing. I contacted Sharp, because their name is on it, and they really don't care or have anything useful to offer other than the same phone number that hasn't been working since at least March 2020 when I first started trying to contact them. Don't waste time or money on the absolute garbage clock from Sharp, Model SPC1107. It's not really a Sharp product , and there's no way to ever get any help WHEN (not if) it fails. The only fix for this junk clock is to simply not own one.
Question: Does the time illuminate at night
Answer: Hi, Thank you for reaching out. The Sharp Model SPC1107, is not backlight and does not illuminate at night. Thanks, The Clock Shop

Product features

Easy to Read - Easy to Use - Atomic Accuracy

The Sharp Atomic Wall Clock has a built in receiver that automatically synchronizes itself with the WWVB radio broadcast by the US Government ‘s National Institute of Standards and Technology (NIST) in Fort Collins, Colorado. The Sharp Atomic Clock will always be accurate to within one second as it receives daily WWVB updates.

Never Needs Setting - Indoor/Outdoor Temperature Readings

- The Sharp Atomic Wall Clock has a built in receiver that automatically synchronizes itself with the WWVB radio broadcast by the US Government ‘s National Institute of Standards and Technology (NIST) in Fort Collins, Colorado. The Sharp Atomic Clock will always be accurate to within one second as it receives daily WWVB updates.

- Indoor Temperature sensor is located in the Atomic clock unit itself, and gives the ambiant temperature of the room.

- The Wireless Sensor transmits the outdoor temperature to the Sharp Atomic Wall Clock. The sensor can be placed anywhere within 100 feet of the receiving unit. NO wire installation needed!

Easy to Read - Easy to Use - Battery Operated

- Month, Date and Day are clearly shown and are updated automatically by the WWVB radio broadcast by the US Government ‘s National Institute of Standards and Technology (NIST) in Fort Collins, Colorado.

- The Sharp Atomic Clock (Model - SPC1107A) can be easily mounted to the wall or can be used on table top or desk with the built in stand.

- No cords! The clock runs off of battery power and can be used almost anywhere. The Main Display unit uses 3 x AA batteries and the wireless outdoor sensor uses 2 x AA batteries (not included)

Sharp (SPC1107A) - Perfect for Desk or Wall

The Sharp Atomic Clock (SPC1107A) is the ideal size to use on the table or counter in the kitchen, or on the desk or bookshelf in the office.

Easy to Read - Time, Date, Temperature

The large 3.3" tall numbers are easy to read, and can be seen from across the room. The temperature for both indoor and outdoor is shown below the time, along with the Day, Month, and Date - and NEVER NEEDS SETTING for easy use.

Wireless Outdoor Sensor

The Wireless outdoor sensor (included) transmits the outdoor temperature to the Atomic Wall Clock. The sensor can be placed anywhere within 100ft of the receiving unit. The wireless technology means no wire installation is necessary.

SHARP - A Name You Can Trust.

Sharp has been making quality alarm clocks for over 25 years and is the largest suppler of Retail Alarm Clocks in the United States with over 61,000,000 sold. Millions trust us with helping them start their day and staying on track.

The Perfectionists: How Precision Engineers Created the Modern World

Based on 262 reviews Check latest price

MFJ-148RC Radio-Controlled 24/12 Hour Dual clock

MFJ

Based on 21 reviews Check latest price

Product description

MFJ Radio-Controlled 24/12 Hour Dual Clock



MFJ-148RC is a specially designed clock for amateur radio. It has two independent atomic 24/12 hour clocks with exclusive UTC time zone and a dedicated Station ten minute ID timer.



It uses a single time base to keep both clocks perfectly synchronized.



It is radio controlled so it keeps perfect time. Each clock can be independently set for 12 or 24 hour display, time zone and DST on/off. 



Set one clock on 12 hour format for local time and the other clock on 24 hour format for UTC. 



Turn DST off on the UTC clock and you will never have to worry about time changes messing up the UTC time again. 



Never forget to ID again.



Built-in 10 minute station ID timer with LED and buzzer alerts. 



Timer resets by a simple press of the timer switch. 



Huge 5Wx1.5H LCD display with LED backlights.



Flip stand for desk display and mounting hole for wall mount. 



Uses two AA batteries (not included). 



Hard plastic cabinet is 6.5W x 3.5H x 3/4D inches.

Sharp Atomic Analog Wall Clock - 12" Silver Brushed Finish - Sets Automatically- Battery Operated - Easy to Read - Easy to USE: Simple, Easy to Read Style fits Any Decor…

Sharp

Based on 689 reviews Check latest price
  • ATOMIC ACCURACY: The Atomic clock has a built-in receiver that automatically synchronizes itself with the WWVB radio broadcast by the US Government’s National Institute (NIST) in Fort Collins, Colorado. The Atomic Clock will always be accurate to within one second as it receives daily WWVB updates.
  • AUTOMATICALLY SETS: Clock resets regularly by radio-control to match the US Atomic Clock in Colorado and adjusts automatically for daylight savings time
  • BRUSHED SILVER FRAME: Brushed frame adds style and longevity to any decor
  • BATTERY OPERATED - (Requires 1 x AA batteries - not included)
  • EASY TO READ - EASY TO USE: Simple, easy to read style fits any decor and is easy to read - perfect for any room in the house: den, office, kitchen, kids room, garage

User questions & answers

Question: Where is this clock made in and design by whom
Answer: The clock was designed by our team in New York. It is made in China.
Question: How thick/deep is this clock (wall to front face of clock)? I need one that is very thin
Answer: The clock is 1-7/8 inches thick as mounted on the wall. So, depends on your idea of what is "extremely thin". I have it mounted on a wall diagonally next to a window and it does not appeal to be obtrusive. The adjoining wall has many mounted photographs (professional) so the clock does not stand out at all. Hope this helps.
Question: Does this have a glass face cover or plastic
Answer: Clear acrylic Face Cover. Handsome looking clock. Love it.
Question: quiet sweep? or tick by second
Answer: Quiet, no ticking

Product features

Sharp SPC968 Analog Atomic Clock

By radio communication with its built-in antenna, the clock regularly updates the hour, minute, and second of the day for continued accuracy from its source, the United States Atomic Clock in Boulder, Colorado. Additionally, the clock adjusts automatically for daylight savings time in the spring and fall.

Easy to Use and Set-Up! Automatically Sets Time and Easy to Read Dial

AUTOMATICALLY SETS: Clock resets regularly by radio-control to match the US Atomic Clock in Colorado and adjusts automatically for daylight savings time

EASY TO READ - EASY TO USE: Simple, easy to read style fits any decor and is easy to read - perfect for any room in the house: den, office, kitchen, kids room, garage

Atomic Accuracy that Never Needs Setting

ATOMIC ACCURACY: The Atomic clock has a built-in receiver that automatically synchronizes itself with the WWVB radio broadcast by the US Government’s National Institute (NIST) in Fort Collins, Colorado. The Atomic Clock will always be accurate to within one second as it receives daily WWVB updates.

BATTERY OPERATED - (Requires 1 x AA batteries - not included)

12" Round Analog Wall Clock is Perfect Size for Anywhere You Need a Clock!

The simple design and style of the clock will fit almost any decor in any room: Den, office, kitchen, school, garage, bedroom, kids rooms, teen rooms, Easy to see time at a glance is perfect for anyone, especially seniors and the elderly.

SHARP - A Name You Can Trust.

Sharp has been making quality alarm clocks for over 25 years and is the largest suppler of Retail Alarm Clocks in the United States with over 61,000,000 sold. Millions trust us with helping them start their day and staying on track

Sharp Atomic Desktop Clock – Auto Set Digital Alarm Clock - Atomic Accuracy - Easy to Read Screen with Time/Date/Temperature Display- Perfect for Nightstand or Desk

Sharp

Based on 1 reviews Check latest price
  • Atomic Alarm Clock - The Atomic Clock has a built in receiver that automatically synchronizes itself with the WWVB radio broadcast by the US Government’s National Institute of Standards and Technology (NIST) in Fort Collins, Colorado. The Atomic Clock will always be accurate to within on second as it receives daily WWVB updates.
  • Wall Mountable and Table Top Use - The clock may be hung on the wall using the hang hole at the back of the clock or displayed on your nightstand by pulling out the backstand. 3 x AAA batteries Needed (not included)
  • Calendar and Day of Week Display - Always know what day of the week it is with a quick glance. The clock displays the calendar and the day of the week.
  • Indoor Temperature Display - Get the real time indoor temperature of your room displayed on your clock.
  • Backlight on Demand - Press the snooze button on top of the clock to illuminate the whole display for 5 seconds. The backlight will also illuminate when the alarm sounds.

User questions & answers

Question: Is it DST
Answer: This clock has DST
Question: Is the clock able to display seconds
Answer: I bought this clock for my Mother in a Nursing Home. She said there is no place for seconds or a timer. But it is a great clock for her...time + day of the week, am, pm, temperature.
Question: can beep be turned off after pressing bar for backlight and time during night
Answer: If you're asking "can the snooze/backlight bar turn off the alarm", the answer is no. If you're asking if there is a way to turn off the beep noise it makes when you hit the backlight bar at 3 AM and don't want to wake up your partner with the noise, the answer is also no.
Question: how do you set the day? already set est, date and time. does day set itself automatically after certain time element
Answer: You can manually set the clock or only set the time zone and DST and wait for the clock to sync with the atomic clock and set itself.

Product features

Easy to Read - Easy to Use - Atomic Accuracy

The Sharp Atomic Desktop & Wall Clock has a built in receiver that automatically synchronizes itself with the WWVB radio broadcast by the US Government ‘s National Institute of Standards and Technology (NIST) in Fort Collins, Colorado. The Sharp Atomic Clock will always be accurate to within one second as it receives daily WWVB updates.

Never Needs Setting - Indoor Temperature Readings & Calander

- The Sharp Atomic Wall Clock has a built in receiver that automatically synchronizes itself with the WWVB radio broadcast by the US Government ‘s National Institute of Standards and Technology (NIST) in Fort Collins, Colorado. The Sharp Atomic Clock will always be accurate to within one second as it receives daily WWVB updates.

- Indoor Temperature sensor is located in the Atomic clock unit itself, and gives the ambiant temperature of the room.

- · Calendar and Day of Week Display - Always know what day of the week it is with a quick glance. The clock displays the calendar and the day of the week.

Easy to Read - Desktop or Wall Mount - Battery Operated

- Month, Date and Day are clearly shown and are updated automatically by the WWVB radio broadcast by the US Government ‘s National Institute of Standards and Technology (NIST) in Fort Collins, Colorado.

- The Sharp Atomic Clock (Model - SPC963) can be easily mounted to the wall or can be used on table top or desk with the built in stand.

- No cords! The clock runs off of battery power and can be used almost anywhere. The Main Display unit uses 3 x AA batteries(not included)

Sharp (SPC963) - East to Read Blue Backlit on Demand

Backlight on Demand - Press the snooze button on top of the clock to illuminate the whole display for 5 seconds. The backlight will also illuminate when the alarm sounds.

Use as Alarm Clock or Desk Clock

The easy to read clock can be used on a table or desk and can be seen from across the room. The indoor temperature is shown below the time, along with the Day, Month, and Date - and NEVER NEEDS SETTING for easy use.

Smaller Size Wall mount Clock for Smaller Spaces

The clock measures 5" x 6.45" and is the prefect size for when wall space is at a minimum. Battery operated, so it will fit anywhere!

SHARP - A Name You Can Trust.

Sharp has been making quality alarm clocks for over 25 years and is the largest suppler of Retail Alarm Clocks in the United States with over 61,000,000 sold. Millions trust us with helping them start their day and staying on track.

La Crosse Technology 513-1417AL-INT Atomic Clock w Outdoor Temp, Grey/Black

La Crosse Technology

Based on 1 reviews Check latest price

Product description

Stylish atomic digital clock is packed with many features and offers modern look to add to your living room or kitchen. Outdoor temperature display receives wireless data from weather-resistant transmitting sensor within a 300 ft (91 M) range, down to -40 F. Large, 2 inch tall time digits set automatically to your time zone selection and adjust to daylight savings, all on an easy to read LCD with calendar display & moon phase. Clock indicates active alarm, WWVB signal, and low/weak battery with adjustable display language. Mount clock onto wall or fold-out leg stand to place on table.

  • Atomic self set time and date with automatic daylight saving time resets (optional on/off)
  • Monitors indoor & wireless outdoor temperature (F/C) with trend arrows
  • Large 2. 125 inch time digits for easy reading
  • Calendar: month, date, day
  • Wall Hanging or Free standing
  • Power Source Type: Battery Operated

User questions & answers

Question: Can the clock itself be mounted outdoors (patio, deck etc
Answer: So long as it is not exposed to rain. Direct sunlight could affect any electronics. And you would have the 'outdoor ' sensor which you could use indoors if you wanted to. Depending upon your climate extremes of heat or cold eventually affect all electronics. Should work with those caveats.
Question: Does clock include outdoor seperate sensor
Answer: yes it does include outdoor sensor
Question: Does it light up in a dark room
Answer: This unit has big bold text and numbers, it does not light up at night. very legible in daytime.
Question: does it make noise for each second as one person commented? maybe that is what the beep on/off setting is for
Answer: Mine doesn't but I'm almost positive I saw the option to have the beep on or off. After all, there's an alarm built in so I would think as long as they have a beep alarm, might as well make it an option for seconds as well.

Product features

Large Digital Time

  • Atomic time and date (manual set option)
  • Automatically updates for Daylight Saving Time (On/Off option)
  • Large 2.125” time digits for easy reading
  • 12 Hour time display with 7 time zone settings (ATL to HAT)
  • Crescendo alarm with 10 minute snooze
  • Calendar: month, date, full weekday
  • 12 Moon phase icons

Wireless Transmission with Long Range

  • Indoor/outdoor temperature (F/C) with Hi/Lo recorded values (resets at midnight daily)
  • Temperature trends
  • Wireless transmit from over 330 ft range (obstructions, such as: walls, glass and resistance, such as: trees, bushes can reduce range)
  • Weather resistance to light moisture, but not direct rainfall and heavy precipitation
  • Proper sensor location: North wall in protected area from direct sunlight and precipitation, but well-ventilated for accuracy
  • Indoor Temperature Range: 32 F to 122 F (0 C to 50 C)
  • Outdoor Temperature Range: -40 F to 140 F (-40 C to 60 C)
  • Transmission Range: Over 330 Ft (100m)
  • Sensor requires 2 AA batteries (not included) (measures 1.57"L x 0.79"W x 5.12"H)

Easy Access (top buttons) and Operation

  • Displays Weekday in English or Spanish
  • Indicates Atomic signal, low/weak battery, and outdoor sensor signal strength
  • Wall hanging or free standing
  • Clock: 2 AA alkaline batteries (not included)
  • Measures 11.10"L x 1.14"W x 6.75"H - LCD: 6.60"L x 2.40"W (2" H time)

GPS Declassified: From Smart Bombs to Smartphones

Based on 26 reviews Check latest price

La Crosse Technology Atomic Analog Wall Clock, 10", Silver

La Crosse Technology

Based on 1 reviews Check latest price

Product description

When you read a clock, you want to be sure it shows the correct time. With La Crosse Technology’s Atomic Analog 10-inch Wall Clock, you can remove all the hassle and worry if the time is correct. This radio-controlled analog clock automatically sets to the exact time, accurate to the second. It has four time zone settings, and it automatically updates for Daylight Saving Time (on/off option). Operating this wall clock is easy. Simply insert one AA alkaline battery into the clock. After the signal is received, press the Time Zone button to set your time zone. Use the manual reset button if you need to readjust the clock, if you are outside the 2,000 mile distance from the signal (located in Fort Collins, CO.) This convenient wall clock has a stylish silver frame and an easy-to-read analog face. Its simple style will complement almost any room.

Keep track of time with the utmost precision with this attractive atomic analog wall clock from La Crosse Technology. The stylish clock receives radio signals at a 60kHz frequency up to 2000 miles away from its source, the United States Atomic Clock in Boulder, Colorado. By radio communication with its built-in antenna, the clock regularly updates the hour, minute, and second of the day for continued accuracy. Additionally, the clock adjusts automatically for daylight savings time in the spring and fall.

An attractive chrome-colored plastic frame encompasses the clock face. Underneath the flat lens, contemporary numerals adorn the face for easy reading. Four buttons allow users to choose the appropriate United States time zone. For those who prefer their clocks to run five minutes fast or to match another clock, the clock offers a manual set option. For the best results, place the clock away from computers, electronic equipment or other articles that receive a signal. The clock may be slow to receive signals upon initial set-up, but should communicate unhindered after one day. This clock requires the separate purchase of one AA battery for a year's worth of power. With a 7-1/4-inch diameter face, the full body of the clock measures 10 inches in diameter with a 1-2/3-inch depth. The clock weighs 1-1/3 pounds upon shipping. --Jessica Reuling

  • Atomic Time with Manual Setting
  • Automatically Sets to Exact Time
  • Accurate to the Second
  • Automatically Updates for Daylight Saving Time (On/Off Option)
  • 4 USA Time Zone Settings
  • Simple Operation: Insert 1 AA Alkaline Battery
  • For precise time in the home or office, atomic analog clock from La Crosse Technology

User questions & answers

Question: Is this a quartz movement clock, wil it work in Southern California
Answer: yes
Question: changed battery (new) , wont reset itself to correct time just keeps sweeping lacrosse WT-3102S, pls. advise
Answer: If you go to their website, they have instructions for different roblems with their products. If you don't find an answer to your question there, you can also speak live to someone at lacrosse. I'm not familiar with this problem with this clock, but when I had problems resetting after a battery change with their weather station, this was my experience.
Question: Does this clock have a (quiet) sweep second hand or does it tick (and make a noise) with each second? Thanks
Answer: You can eliminate most of the sound by carefully opening the clock and snipping the second hand with a nail clipper. I did this when my old La Crosse clock was failing because, inexplicably, the second hand was scraping against the face and one of the other hands. It got really quiet after that. The only noise left is the occasional reset that sweeps the minute and hour arms when the time needs to be corrected (it's very rare).
Question: Does 10" refer to the overall diameter, or just the clock mechanism
Answer: overall the clock is 10"

Product features

La Crosse Technology WT-3102S 10" Atomic Analog Classic Wall Clock

Highlighted by a sleek round frame, featuring a timeless analog dial, this essential clock is perfect accenting any ensemble. Hang it above your writing desk to keep track of the time while you work, or let it accent a collection of metallic art prints for eye-catching appeal. Buying an atomic clock just makes sense. With radio-controlled time never have to remember to set your clock again. Simply select your time zone & clock sets itself. This clock will always have you right on time!

Marathon Commercial Grade Panoramic Autoset Atomic Digital Wall Clock with Table or Desk Stand, Date, and Temperature, 8 Time Zone, Auto DST, Self Setting, Self Adjusting, Batteries Included (Silver)

Marathon

Based on 2 reviews Check latest price
  • Digital Clock Large Display - Big Digits on display in Wall Clock Category! 3.6 inch numbers! This wall hanging or table standing clock with large number display. Functions as a desk alarm clock with snooze and has been designed with absolute simplicity in mind, so you can operate and read it without any fuss
  • Accurate Date and Time - This wall clock sets accurate times and features an alarm that will keep you from missing important meetings, appointments and events. Buy the most valuable clock for the least money. This clock self-sets and self-adjusts using radio frequencies broadcast from NIST’s Colorado Atomic Clock (Atomic feature only functions in North America)
  • Clock for office - 12 or 24 Hours display formats; 8 time zones to choose (PST, MST, CST, EST, AST, NST, HST & AKST) and an option to turn DST on or off; temperature display in Celsius or Fahrenheit; accurate date and time. These digital wall clocks work well for office, bathroom or livingroom decor.
  • Wall Clocks with Temperature - These digital wall clocks are equipped with high precision detection sensors, that provide you with the most accurate indoor temperatures and create the most comfortable indoor environment.
  • Autoset Battery Operated Digital Wall Clock - Once you insert two AA batteries(included), it will automatically set the correct time. You just need to select the time zone.

Product features

Large, Easy to Read Display

Crisp, at-a-glance display of the time, date and temperature!

Perfect for Commercial Use

This Marathon atomic clock is self-adjusting and self-setting, eliminating the need to manually input the time and date. Makes this clock ideal for Government, Banks, Schools, Churches, Offices, and Banks.

Perfect for Professional Use

The simple, easy-setup of this clock makes the Marathon '33 Panoramic auto-setting wall clock fantastic for, office, school, hospital, etc.

Perfect for Home Use

The clock’s sleek, contemporary design features a brushed steel effect frame and large numbers making this beautiful clock ideal for home use.

Four Colours to Choose From

Get the one that will fit your environment best! Whether it's an office, home office, or bedroom!

Marathon has been creating beautiful, reliable, and accurate timepieces since 1939!

Atomic Self-Setting Panoramic Clock

Simply insert the batteries provided with the clock and it will synchronize to the time set out by the atomic clock in Colorado once the signal is received. It can be used anywhere in continental North American including Hawaii. Choose from Pacific, Mountain, Central, Eastern, Atlantic, Newfoundland, Alaska and Hawaii standard time. The clock includes all 8 North American time zones – a worldwide exclusive Marathon clock feature! The time and date can easily be set manually for those using the clock outside of North America. Daylight Savings Time on/off option is included.

Built-In Table Stand

It easily hangs on a wall or can be placed on a table top using the sturdy fold-out stand. Easy to use, easy to set, and easy to mount or stand. Perfect for anywhere in your home, or professional environment.

La Crosse Technology 16 Inch Stainless Steel Atomic Clock - White Dial 16" Metal Frame

La Crosse Technology

Based on 801 reviews Check latest price

Product description

Modern technology featured in a stylish, brushed aluminum 16 In. wide frame, this clock has appeal. Movement sets itself to the accurate, atomic time and automatically adjusts your desired time zone selection. Solid metal construction with its 2 In. deep frame and white dial with large standard Arabic black numbers. Resets twice, yearly, for daylight saving time, saving you the nuisance & precious time to adjust clock hands every time. Wall mount and free from cords as it's a simple one battery operation. Add additional AA batteries (optional compartment) to extend clock's battery life.

  • Automatically sets to exact time
  • Accurate to the second
  • Automatically updates for Daylight Saving Time (ON/OFF option)
  • 4 Time zones: PT, MT, CT, ET
  • Simple Operation: Insert 1 AA Alkaline Battery (not included)

User questions & answers

Question: is the metal frame magnetic
Answer: No, it is an aluminum alloy frame. Not magnetic.
Question: Is the glass cover over the clock face flat or convex
Answer: It was flat, but the hands did not point correctly. It stopped working after some hours. I have now given it away to someone to see if can be used somehow.
Question: Once hung, is the frame flush against the wall
Answer: Yes, the frame rests flush against the wall.
Question: does this clock have a plastic cover or glass
Answer: The units we have in stock are glass, but it's a very thin glass. We have had a few shatter in the past.

Product features

La Crosse Technology WT-3161WH 16 Inch Stainless Steel Atomic Analog Wall Clock

Convenient self-setting time to Universal time by a WWVB signal with automatic updates for Daylight savings time. It features a one-touch time zone set button and requires only 1 AA alkaline battery (not included.) Relax with peace of mind knowing the accuracy of this clock and keeping on time! **Optional bonus: Add 2 additional AA alkaline batteries to extend power for up to 3 years!

Beautiful Silver Metal frame

Stunning brushed aluminum metal wraps around the white dial and covered by glass. Solid construction, but lightweight so can hang onto almost any wall structure.

*Bonus Feature: Extra battery compartment

*Additional compartments to add 2 extra AA batteries to prolong the clock's battery life (up to 3 years/36 months)

Brushed Aluminum frame

  • Brushed Aluminum frame
  • 16" Diameter
  • 2" Depth

Easy Reading 14" dial

  • Atomic Time with Manual Setting
  • Automatically Sets to Exact Time
  • Accurate to the Second
  • Automatically Updates for Daylight Saving Time (On/Off Option)
  • 4 Time Zone Settings
  • Simple Operation: Insert 1 AA Alkaline Battery

Optional additional battery compartment

  • Power requirements: 1 AA alkaline battery (not included) or ADD 2 additional AA to extend battery life (up to 3 years/36 months)

Accuracy & Self adjusting every Daylight Savings

Keep an eye on the hour with this traditional wall clock. Featuring a round silhouette, neutral-colored 14" dial, and glass covering, this clock is perfect for the home office, workplace,>

Marathon Large Atomic Wall Clock with Auto Backlight, Calendar, Temperature, and Humidity - Batteries Included - CL030052

MARATHON

Based on 169 reviews Check latest price
  • Plastic frame
  • EASY TO READ: The large wide-angle easy to read display has an ambient light sensor which triggers a soft backlight when it is dark. RCC Icon only shows when searching for signal
  • MULTIPLE TIME ZONES: You can easily switch between 6 time zones (Pacific, Mountain, Central, Eastern, Atlantic & Newfoundland)
  • MULTIPLE LANGUAGES: Choose from 7 languages (English, Danish, Dutch, French, German, Italian & Spanish)
  • FAHRENHEIT & CELSIUS: Option for either Fahrenheit or Celsius for the indoor temperature display
  • INDOOR HUMIDITY FEATURE: Along with the time, day, month, date and indoor temperature, this clock also displays indoor humidity

User questions & answers

Question: How well can this be read in the daytime
Answer: It can be read very easily although it doesn’t have a backlight during daytime hours. It is your basic black digits/letters on your basic grey LCD background. Hope this helps.
Question: can you select 24 format
Answer: Kindly follow below instructions 1) In normal time mode, press and hold [ TIME SET ] button for 2 seconds until the 12/24 Hr flashes 2) Press the + button to change to 12 or 24 hrs 3) Continuously press the Time set button until nothing is blinking on your screen
Question: Is this LCD display
Answer: Hello from Marathon Watch, Thank you for reaching out to us. It is an LCD display on the Marathon CL030052 Atomic Clock. Thank you Marathon Watch Customer Service
Question: If the room complete darkness. Does the backlight stay on throughout
Answer: The back light is useless but it does stay on in darkness. The back light is so dim, you cannot read in an almost dark room. Marathon does not respond to emailed questions. The advertising picture is a phony. To make the clock readable in darkness, I made a bracket with led's to light the front of the clock. so I can read it at night. The only good thing I can say is that it does keep accurate time.

Product features

Large Easy-to-Read Display

The large wide-angle easy to read display can select Fahrenheit or Centigrade for the indoor temperature display. Along with the time, day, date and indoor temperature, this clock also displays indoor humidity.

Atomic Self Setting

This Marathon atomic clock is self-adjusting and self-setting, eliminating the need to manually input the time and date. Simply insert the batteries provided with the clock and it will synchronize to the time set out by the atomic clock in Colorado once the signal is received. The clock includes all 8 North American time zones – a worldwide exclusive Marathon clock feature! It can be used anywhere within continental North American including Hawaii.

Auto Backlight

The ambient light sensor ensures the face of the clock is illuminated in the dark and easy to read. this sensor triggers a soft glow to illuminate the dial when placed in low light.

Rubidium Atomic Clock: The Workhorse Of Satellite Navigation

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