Features10 Year Battery Shock Resistant 200M Water Resistant E-data memory 40 World time 29 time zones, 27 cities Daylight savings time on/off Auto Electro-luminscent backlight with afterglow 1/100 second stopwatch Measuring capacity: 23:59 59.99" Measuring mode: elapsed time, split time, 1st-2nd place times Countdown Timer Input range: 1 minute to 24 hours Measuring unit: 1 second Auto-repeat function 5 multi-funtion alarms with snooze Hourly time signal Auto-calendar ( pre-programmed until the year 2039) 12/24- hour formats Accuracy: +/- 15 seconds per month Approx. battery life: 10 years on CR2025