Wallarge Atomic Clock with Outdoor and Indoor Temperature - 12.5 Inch Self-Setting Digital Clock Large Display, Battery Operated Wall Clocks or Desk Clocks for Bedroom, Livingroom, Office

• Accurate Atomic Clock – Never Need Setting. 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 Temperature Sensor - The Wireless outdoor sensor transmits the outdoor temperature to the atomic clock. The sensor should be placed within 100ft of the clock. Also, clock has a built-in high-quality indoor temperature sensor so that you can read the temperature both indoor and outdoor.
• Digital Wall Clock or Desk Clock - Jumbo 2.5" Height Time Digital Display - Use as either a wall clock or as a desk clock, it is easy to read, easy to Use and easy to set up. This atomic clock has been designed with absolute simplicity in mind, you can also set it manually. They are excellent clocks for seniors, perfect for anyplace in your home or office.
• Multiple Display Modes – 12/24 Hour time formats with accurate and clear second minute and hour display; 4 time zone to choose (PST, MST, CST, EST); auto daylight saving time; temperature display units in Celsius (℃) or Fahrenheit (℉).
• Battery Operated Atomic Wall Clock – Both clock and outdoor sensor are supported by batteries only, no need to plug or charge(Batteries not included). The existed alarm features can wake you up in the morning or help you keep track of dates and days of the week to avoid missing any important meetings or appointments.

As Radio Controlled atomic clock, it can receive the time signal transmitted by the National Institute of Standards and Technology (NIST), which is regulated by 3 atomic clocks and deviates less than 1 second within 3,000 years. The NIST broadcasts the time signal (WWVB,60KHz) continuously from Fort Collins, Colorado. This signal can be received anywhere in the continental USA and Canada that long wave (AM) radio reception is possible with a portable radio. It is expected that the signal can reach a distance of over 2,000 miles from the transmitter.

Therefore, your clock will receive the signal within the broadcast range anywhere an AM signal can be received; generally, the time signal cannot be picked up in massive metal and concrete structures unless near a window. In addition, some environmental effects (see below) may affect the transmitting distance and reception. For more information, please refer to the WWVB web page of NIST.

This digital wall clock will automatically receive the time signal every day at midnight and makes any required adjustments to the time setting. That is to say, it updates the time every night automatically, so it is more accurate than any other ordinary electronic clock. Therefore, it is very suitable for those friends who have high requirements for time accuracy.

Note 1: Frequent use of this feature may affect battery life.

Note 2: After 48 hours, if the clock hasn't received the signal, or if you have any problems or do not understand any parts of these instructions please write to us freely.

Note 3: If the RCC time signal is not received successfully and the time automatic setting fails, you can also cancel the radio reception and set the time manually.

This digital clock's indoor temperature monitoring relies on a built-in Swiss high precision SHTC3 indoor temperature sensor, and its outdoor temperature monitoring is mainly through the radio frequency (RF) transmitter to collect the outdoor temperature and then send the temperature information to the receiver, and finally display the temperature on the clock.The maximum receiving distance of outdoor temperature is 330ft.

1.Operating temperature is from -40℉ to 158℉ (-40℃ to 70℃)

2. The indoor temperature display range is -40℉ to 158℉(-40℃ to 70℃). Indoor temperature is measured once every 10 seconds.

3. The outdoor temperature display range is -40℉to 158℉ (-40 ℃to 70℃).The outdoor transmitter temperature is measured once every 10 seconds

but transmit RF signal every 32 seconds.

4.Temperature accuracy +/- 0.1℉(+/- 0.1℃)

This is an atomic alarm clock for anyone.However,since atomic clock will automatically receive the time signal every day at midnight and makes any required adjustments to the time setting.So it is more accurate than any other ordinary electronic clock. Therefore, it is very suitable for those industries and friends who have high requirements for time accuracy,such as scientists, stock traders, doctors, nurses, teachers, lawyers,etc.

Tip: Since in the self-setting (RCC)mode, the clock will automatically turn on to receive radio signals every night, so the battery may consume quickly,

or sometimes in extreme weather or weak signal or other disturbances appear nearby, the clock may also appear to receive the wrong time signal instruction.Therefore,it is suggested to use self-setting (RCC) function reasonably,such as turning on RCC function once every week or according to your own requirements for time accuracy.

1. Make sure that your location can successfully receive the time signal.

2. Put the clock in an open area or near a window with good signal.

3. Don’t put the clock with iron household items.

4.The clock’s default auto daylight saving time is on, time format is 12 hour, and the time zone is eastern time zone.If you need to change these default settings, you need to set them before the clock starts searching for RCC time signal.

This digital clock has beautiful package,good appearance design,a variety of excellent featuresso,so it can be great present idea.You can gift it on various occasions such as Thanksgiving Day, Christmas, Halloween, birthdays, wedding or any relate events.