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.