Casio Men's GW530A-1V G-Shock Atomic Tough Solar Watch Quality Japanese-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