Casio Men's GW2310-1 G-Shock Solar Atomic Digital Sports Watch With its multi-band 6 atomic timekeeping, tough solar power, shock resistant case and daily alarm with snooze, you'll keep time without missing a moment. 12 and 24 hr. Formats, 1/100 sec. Chronograph, daily alarm with snooze World time (31 time zones and 48 cities) Auto EL backlight Water resistant to 660 feet (200 M): suitable for recreational scuba diving