Features: 200 M Water Resistant Shock resistant (G-SHOCK) Rust resistant Electro-luminescent backlight Auto light switch, dual illuminator, selectable illumination duration, afterglow Low temperature resistant (-20C) World time 29 time zones (48 cities), city code display, daylight saving on/off 1/100-second stopwatch (ST1) Measuring capacity 99959’59.99” Measuring modes Elapsed time, split time, 1st-2nd place times Other Auto start 1/100-second stopwatch (ST2) Measuring capacity 99959’59.99” Measuring modes Elapsed time, split time, 1st-2nd place times Countdown timer Measuring unit 1 second Countdown range 24 hours Countdown start time setting range 1 minute to 24 hours (1-minute increments and 1-hour increments) Others Auto-repeat, progress beeper Multi-function alarms 5 independent multi-function alarms (4 one-time alarms and 1 snooze alarm) Hourly time signal Auto-calendar (to year 2099) 12/24-hour format Button operation tone on/off Flash alert Regular timekeeping Hour, minutes, seconds, pm, month, date, day Accuracy 15 seconds per month Approx. battery life 3 years on CR2025 Dimensions 51.0 X 46.5 X 16.4 mm Weight 53.0 g