10 Best Atomic Clock of December 2025

• Adjustable backlight (hi/low/off) using Included AC adapter or battery operated on-demand and adjustable display mode: full weekday; weekday & date; seconds; or indoor temperature (F)
• Extra-large, easy to read 2 inch time digits to assist those suffering from memory loss and/or labor with abbreviated words
• Alarm with 10 minute snooze
• Wall hang or table standing
• Note : When plugged in the AC adapter the clock Snooze/light button has 3 settings, One press can turn off the light, Second press can have the backlight on low. And Third press off the Snooze/light button has the backlight on high.

La Crosse Technology

• 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 AA batteries (not included)

Sharp

• Atomic all clock with self-setting time and date, indoor temp, alarm. Please note: Product has ONLY indoor temperature, NOT outdoor temperature.
• Automatically updates for seasonal time changes where applicable
• Clock with alarm and snooze; time with seconds.Works well with good alkaline AA batteries .
• Displays time, date, day, temp on one screen; wall hanging or free standing;
• Measures 9 by 1 by 7.2 inches; requires 2 AA batteries (not included)

La Crosse Technology

• Wirelessly monitors indoor/outdoor temperature
• 12 moon Phase icons
• Atomic Time & date. Transmission range: Up to 330 Feet . Outdoor temperature range: -39.8°F to 139.8 °F (-39.8°C to 59.8 °C)
• Automatically updates for daylight savings
• Perpetual calendar
• Brushed-aluminum atomic wall clock with time, date, and temperature functions
• Radio-calibrated for accuracy to within 1 second; automatic self-adjustment
• Indoor and remote temperatures, moon phase readings, and alarm with snooze
• 12- or 24-hour clock modes; time zone setting; remote transmission up to 330 feet
• 12-1/4 by 8 by 1-1/4 inches; takes 4 AA batteries; wall-mount or tabletop; 1-year warranty

La Crosse Technology

• Digital Wall Clock, Autoset (no backlight) - Using radio frequencies broadcast from NIST’s Colorado , the clock will automatically set to the correct time. Automatically adjusts to Daylight Savings Time while set the DST on.
• Wall Clocks Battery Operated, with Alarm - This digital calendar alarm day clock required 3 “AA” long life batteries (included) for operation, no redundant wires, easy to use. Turn on the alarm clock before going to bed, it will wake you up in the morning.
• Wall Clocks with Temperature and Humidy - Excellent wall clocks for livingroom, office, bathroom decor,etc. Help you monitor indoor temperature and humidity to avoid cold. 12/24 hours formats with clear Hours, Minutes and Seconds display;4 Time Zone to choose.
• Digital Clock Large Display - Clocks for seniors.This atomic clock has been designed with absolute simplicity in mind, you can also set it manually without any more ado. Wall clock or desk clock, large and clear digital display, easy to read.
• Accurate Date and Time - This digital calendar alarm day clock can help you keep track of dates, days of the week and times to avoid missing any important meetings, appointments or anniversaries, work well for work, study or travel schedule.

WallarGe

• LARGE DISPLAY AND MULTIPLE LANGUAGE OPTIONS - Easy to read 4" digits. Additionally, days of the week can be displayed in English, French, Spanish, German or Italian.
• SELF-SETTING/ADJUSTING - Using radio frequencies broadcasted from NIST’s Colorado atomic clock (Atomic feature only functions in North America)
• MULTIPLE DISPLAY MODES – 12 or 24-Hour Time Formats with Full Calendar Display. Weekday displayed in one of the 4 languages (English, French, Spanish, and German)
• 8 TIME ZONES - A Marathon exclusive, choose between PST, MST, CST, EST, AST, NST, HST & AKST with option to turn on or off Daylight Savings Time
• BATTERIES INCLUDED - 2 AA-Size long life batteries included

Marathon

• 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) or ADD 2 additional AA to extend battery life (up to 3 yrs)
• Accurate, atomic self-setting time & date with automatic resets for Daylight Saving time
• Black plastic wide frame
• 4 Time Zone Settings
• Simple operation with 1 AA alkaline battery
• Accurate to the Second

La Crosse Technology

• Indoor/outdoor temperature (F/C)
• Atomic time and date (manual set option) withautomatic updates for Daylight Saving Time (on/off option)
• Moon phase icons
• 12 Hour time display with 7 time zone settings (ATL to HAT)
• Large 2.125 inch time digits for easy reading

La Crosse Technology

• Key features - This unique 8 inch high resolution digital alarm clock clearly spells out the time, period of the day, full day of the week, month and date in large, clear letters with no confusing abbreviations
• Unique functions - The day clock by American Lifetime is the only one of its kind to include a set of multi-function alarms. Set up to 5 daily alarms, with the option of reminders to take medications throughout the day. This clock uses the DC209 model which has a screen resolution of 800 x 600
• Battery backup - This day clock also has battery back up a in case of a power outage, it automatically resets to the correct time and date when the power returns
• Makes for a perfect gift - The words dementia, alzheimer's and memory loss are intentionally excluded from the packaging, making it a great gift. We stand behind the durability of our goods and offer an unconditional guarantee. If you are not completely satisfied with our products, we will refund your money no questions asked
• Customer service - At American Lifetime you can return the product for free within the first 30 days, no questions asked. Our customer service team is here for you and happy to help answer any questions you may have

American Lifetime

• 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

La Crosse Technology