Casio #G2900F-2V Men's Classic E Data Memory Blue G Shock Watch 10 Year Battery Life, Shock Resistant, 200M Water Resistant, Auto EL Backlight with Afterglow E-Data Memory, Actual number of records depends on number of characters per record, World Time, 4 Multi-function Alarms & 1 Snooze Alarm Countdown Timer, Auto-repeat Function, 1/100 second stopwatch, Hourly Time Signal Auto Calendar (pre-programmed until the year 2039), 12/24 Hour Formats, Accuracy: +/-15 seconds per month Battery CR2025, Approx. battery life: 10 years, Module 2548, Size of case/total weight: 52.4 x 45.9 x 16.5mm / 58g