G-Shock/Casio GS-A700W1A Details Case Size (L x W x H): 37.4 × 35.5 × 6 mm Weight: 50 g Case and Bezel Material: Resin Band: Stainless Steel Band, Adjustable Clasp Water Resistance: Water Resistant Power Supply and Battery Life: Approx. battery life: 3 years on CR1616 Exterior Glass: Mineral Glass Watch Features Stopwatch: 1/100-second stopwatch, Measuring capacity: 59'59.99'', Measuring modes: Split time, 1st-2nd place times Alarm / Hourly Time Signal: Daily alarm, Hourly time signal Light: LED Backlight Light Colour: LED Amber 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