Basic InformationCase size (L W H)38.2 35.2 8.5 mmWeight21 gCase and bezel materialResinBandResin BandWater resistanceWater ResistantPower supply and battery lifeApprox. battery life: 7 years on CR2016ExteriorGlassResin GlassWatch FeaturesStopwatch1/100-second stopwatch Measuring capacity: 59'59.99'' Measuring modes: Elapsed time, split time, 1st-2nd place timesAlarm/hourly time signalDaily alarmHourly time signalLightLED lightCalendarAuto-calendar (set at 28 days for February)AccuracyAccuracy: 30 seconds per monthOther features12/24-hour formatRegular timekeeping: Hour, minute, second, pm, date, day