Casio Men's WVA107HDA-1AV Waveceptor Atomic Watch Quartz movement Auto receive function (4 times per day); Signal: WWVB, Frequency: 60kHz Auto EL Backlight with Afterglow; World Time 29 times zones (48 cities), city code display, daylight saving auto/on/off Water resistant to 660 feet (200 M): suitable for recreational scuba diving