Casio Men's G-Shock GX56-1A Black Digital Sport Watch Tough Solar Power, Shock Resistant, 200M Water Resistant Mud Resistant, Full Auto EL Backlight with Afterglow, World Time 4 Daily alarms and 1 Snooze Alarm, Hourly time signal, Full auto-calendar (pre-programmed until the year 2099) 12/24 hour formats, Button operation tone on/off, Accuracy: +/- 15 seconds per month, Battery power indicator Power saving function, Storage battery: Solar rechargeable battery, Approx. battery life: 11 months on full charge (without further exposure to light), Module: 3221, Size of case / total weight: 55.5 x 53.6 x 17.5mm / 88g