G-Shock/Casio LA-20WH-1A Details Case Size (L x W x H): 34.5 × 30.4 × 8.6 mm Weight: 16g Case and Bezel Material: Resin Band: Resin Band Water Resistance: Water Resistant Power Supply and Battery Life: Approx. battery life: 5 years on CR1616 Exterior Glass: Resin Glass Watch Features Stopwatch: 1/100-second stopwatch, Measuring capacity - 59'59.99", Measuring modes - Elapsed time, split time, 1st-2nd place times Alarm/Hourly Time Signal: Daily Alarm, Hourly Time Signal Light: LED Light Light Colour: LED: Amber Calendar: Auto-calendar (auto calendar set at 28 days for February) Accuracy: Accuracy: ±30 seconds per month Other Features: 12/24-hour format, Regular timekeeping - Hour, minute, second, pm, date, day