Basic InformationCase size (L W H)37.9 34.9 11.9 mmWeight20 gCase and bezel materialResinBandResin BandWater resistance50-meter water resistancePower supply and battery lifeApprox. battery life: 10 years on CR1620ExteriorGlassResin 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 signalDaily alarmHourly time signalLightLED backlight AfterglowLight colorLED:AmberCalendarAuto-calendar (to year 2099)AccuracyAccuracy: 20 seconds per monthOther features12/24-hour formatRegular timekeeping: Hour, minute, second, pm, month, date, day