Basic InformationCase size (L W H)44.1 40 11.5 mmWeight28 gCase and bezel materialResinBandResin BandWater resistanceWater ResistantPower supply and battery lifeApprox. battery life: 10 years on CR2025ExteriorGlassResin Glass / Spherical GlassWatch FeaturesWorld timeDual timeStopwatch1/100-second stopwatch Measuring capacity: 23:59'59.99'' Measuring modes: Elapsed time, split time, 1st-2nd place timesAlarm/hourly time signalHourly time signalMulti-function alarm (with snooze alarm)LightLED backlight AfterglowLight colorLED:GreenCalendarAuto-calendar (to year 2099)AccuracyAccuracy: 30 seconds per monthOther features12/24-hour formatRegular timekeeping: Hour, minute, second, pm, month, date, day