G-Shock World Time Chrono Digital Black Dial Men's watch #G001-1B Shock Resistant, 200M Water Resistant, Auto EL Backlight with Afterglow Flash alert, World Time, 2 Multi-function Alarms and 1 Snooze Alarm, Hourly Time Signal 1/100 second stopwatch, Countdown Timer, Button operation tone on/off Full Auto Calendar (pre-programmed until the year 2099), Accuracy: +/-15 seconds per month Battery CR2025, Approx. battery life: 7 years, Module 3247, Size of case/total weight: 51.7 x 48.8 x 18.0mm / 68g