Basic InformationCase size (L W H)43.2 34.4 8.2 mmWeight25 gCase and bezel materialResinBandResin BandWater resistanceWater ResistantPower supply and battery lifeApprox. battery life: 5 years on CR2016Watch FeaturesWorld timeDual timeStopwatch1/100-second stopwatch Measuring capacity: 23:59'59.99'' Measuring modes: Elapsed time, split time, 1st-2nd place timesAlarm/hourly time signalDaily alarmHourly time signalCalendarFull auto-calendar (to year 2099)Mute featureButton operation tone on/offAccuracyAccuracy: 15 seconds per monthOther features8-digit calculator12/24-hour formatRegular timekeeping: Hour, minute, second, am/pm, year, month, date, day