Casio Men's Multi Alarm e Data Memory Sports LCD Watch #W-755-2AV E-Data Memory, 100M Water Resistant, Auto LED Light with Afterglow, World Time 5 Multi-function Alarms (1 with snooze), Countdown Timer, 1/100 second digital stopwatch Hourly Time Signal, Auto Calendar (pre-programmed until the year 2039), 12/24 Hour Formats Accuracy: +/-30 seconds per month, Battery CR2025, Approx. battery life: 10 years Module 3079, Size of case / total weight: 44.5 x 41.0 x 13.0mm / 42g