CASIO G-shock Mens Watch Style# GLX6900-1cr [Watch] Imported Shock Resistant, 200M Water Resistant, Low Temperature Resistant LCD (-20 C / -4 F) Full Auto EL Backlight with Afterglow, Flash Alert, Flashes with buzzer that sounds for alarms, hourly time signal, countdown timer time-up alarm, countdown timer progress beeper and stopwatch auto-start, Tide Graph (tide level for specific date and time) Moon Data (moon age of the input data, moon phase graph), World Time, 29 times zones (48 cities), city code display, daylight saving on/off, 4 Multi-Function Alarms and 1 Snooze Alarm Hourly Time Signal, 1/100 Second Stopwatch (ST1), Full Auto Calendar (pre-programmed until the year 2099), 12/24 Hour Formats,Button operation tone on/off, Accuracy: +/-15 seconds per month Battery: CR2025, Approx. battery life: 2 years, Module 3194 , Size of case/total weight: 53.2 x 50.0 x 17.7mm / 65g