Sharp Atomic Clock with 4-Inch Display, Outdoor Sensor, Battery Powered

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.
Jumbo 4” 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 time (hours, minutes, seconds), indoor and outdoor temperature, calendar and day of week