Mens Atomic Black Waveceptor Analog Face with Digital insert for stylish yet functional appearance 50 Meter Water Resistant Atomic Watch - Receives time calibration radio signals which keep the displayed time accurate. Time calibration signal reception. Auto receive function (one time per day at 1 - 00am). Manual receive function. World time. 29 time zones, 30 cities. Daylight savings time on/off. Date alert