Ambient Weather RC-1200WS 12" Atomic Radio Controlled Wall Clock, White/Silver The Ambient Weather RC-1200WS turns an ordinary wall clock into an extraordinary, accurate time piece with the radio controlled time. The clock automatically synchronizes the time several times a day based on a radio signal from Fort Collins, CO (WWVB). The Radio Controlled Clock never needs resetting and is accurate to the second. The clock automatically adjusts for daylight savings time and your time zone. An override daylight savings time feature is available for residents in Arizona. The reception attempt for the daily automatic synchronization with the radio time is performed several times a day. One successful synchronization per day is sufficient to accurately set the clock to the second. Includes four time zone settings (Pacific, Mountain, Central and Eastern).