G-Shock/Casio GS-W800H1AV Details Case Size (L x W x H): 44.2 × 36.8 × 13.4 mm Weight: 37 g Case and Bezel Material: Resin Band: Resin Band Water Resistance: 100-m eter water resistance Power Supply and Battery Life: Approx. battery life: 10 years on CR2025 Country of Origin: China Exterior Glass: Resin Glass Compatible Band Size: 145 to 215 mm Watch Features World Time: Dual Time Stopwatch: 1/100-second stopwatch, Measuring capacity: 23:59'59.99'', Measuring mode: split time Alarm / Hourly Time Signal: Hourly time signal, Multi-function alarm (with 1 snooze alarm) Light: LED backlight, Afterglow Light Colour: LED Green Calendar: Full auto-calendar (to year 2099) Accuracy: Accuracy: ±30 seconds per month Other Features: 12/24-hour format, Regular timekeeping: Hour, minute, second, pm, year, month, date, day