Atomic Clock always accurate

Atomic wall clock. The numbers are 2" high and has date and day of the week. It measures 9" X 9" X 1" This precise clock tunes into the radio signal emitted by the U.S. Atomic Clock in Colorado, and resets itself automatically to the exact Date, Month, Year, hour, minute, and second. Imagine a clock that is always accurate to the exact second, and automatically adjusts to daylight savings time. The same technology used to govern ship movements, space flight, radio and television stations is now available to help consumers manage meetings, appointments, and family schedules

How They Work

A radio controlled clock has a radio inside, which receives a signal that comes from a place where an atomic clock is located. In the United States, the signals received by radio controlled clocks originate from NIST Radio Station WWVB, which is located near Fort Collins, Colorado. WWVB broadcasts on a frequency of 60 kHz. Your radio controlled clock actually has a miniature radio receiver inside, which is permanently tuned to receive the 60 kHz signal. Once your radio controlled clock has decoded the signal from WWVB, it will synchronize its own clock to the message received by radio. Before it does so, it applies a time zone correction, based on the time zone setting that you supplied. The time broadcast by WWVB is Coordinated Universal Time (UTC), or the time kept at the Prime Meridian that passes through Greenwich, England. While a few users like their clocks to display UTC (ham radio operators, for example), most prefer to display local time.