Casio G-Shock x GA-100 Series ft. Three-Dimensional Men Sports Round 200m Water Resistant Watch GA-100CB-1A GA100CB GA100 GA-100 GA-100CB Discover the Casio G-Shock GA-100 series, built with legendary shock resistance and 200-meter water resistance. These analog-digital watches feature a bold, large case design, a 1/1000-second stopwatch, world time for 29 time zones, and magnetic resistance for unstoppable durability and performance. Module / Movement 5081 (quartz) Battery Life / Accuracy Approximately 2 years (+/-15 seconds per month) Crystal Mineral crystal Light LED light (auto light switch, selectable illumination duration, afterglow) Case / Band Material Resin case with resin band Water Resistance 200m / 20 bar Case Size Thickness: 16.9 mm Diameter: 51.2 mm Length: 55.0 mm Lug width: Integrated Other Specifications Casio G-Shock x GA-100 Series ft. Three-Dimensional Shock resistant Magnetic resistant World time (29 time zones, daylight saving on/off, home/world time city swapping) 1/1000-second stopwatch (up to 100 hours, elapsed time, lap time, split time) 1-second countdown timer (up to 24 hours, auto-repeat) 5 daily alarms (with 1 snooze alarm) Hourly time signal Full auto-calendar (to year 2099) 12/24-hour format Regular timekeeping (analog-digital display)