Features 10-year battery life 1/100-second stopwatch Dual time 5 alarms 100-meter water resistance LED backlight Wide face Specifications Case / bezel material: Resin Resin Band Resin Glass 100-meter water resistance LED backlightAfterglow Dual time 1/100-second stopwatchMeasuring capacity: 23:59’59.99’’Measuring modes: Elapsed time, split time, 1st-2nd place times Countdown timerMeasuring unit: 1 secondCountdown range: 24 hoursCountdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments)Other: Auto-repeat 5 multi-function alarms (with 1 snooze alarm) Hourly time signal Full auto-calendar (to year 2099) 12/24-hour format Regular timekeeping: Hour, minute, second, pm, month, date, day Accuracy: ±30 seconds per month Approx. battery life: 10 years on CR2032 Size of case : 54.4×51.2×15.7mm Total weight : 57g