Casio G-Shock x GA-1000 Series ft. Master Of G aka Gravitymaster Men Sports Round 200m Water Resistant Watch GA-1000-4B GA1000 GA-1000 Casio G-Shock GA-1000 series, the first Gravitymaster model equipped with Twin Sensor technology featuring a digital compass and thermometer. This analog-digital aviation-inspired timepiece delivers shock resistance, 200m water resistance and full auto-calendar until 2099. The 50.8mm resin case with spherical mineral glass and Neobrite luminous coating ensures exceptional legibility. Module / Movement 5302 (quartz) Battery Life / Accuracy Approximately 2 years (+/-15 seconds per month) Crystal Mineral crystal (curved) Light LED light / neon illuminator (auto light switch, selectable illumination duration, afterglow) Case / Band Material Resin / stainless steel case with resin band Water Resistance 200m / 20 bar Case Size Thickness: 16.9 mm Diameter: 50.8 mm Length: 52.1 mm Lug width: Integrated Other Specifications Casio G-Shock x GA-1000 Series ft. Master Of G aka Gravitymaster Shock resistant World time (31 time zones, city code display, daylight saving on/off) 1/100-second stopwatch (up to 24 hours, elapsed time, split time) 1-second countdown timer (up to 60 minutes) 5 daily alarms (with 1 snooze alarm) Hourly time signal Full auto-calendar (to year 2099) Button operation tone on/off 12/24-hour format Regular timekeeping (analog-digital display) Enhanced Features and Functions Compass function (0° to 359°) Thermometer (-10°C to 60°C)