Basic InformationCase size (L W H)45 38.6 9.5 mmWeight30 gCase and bezel materialResinBandResin BandPower supply and battery lifeApprox. battery life: 3 years on SR920WExteriorGlassResin Glass / Spherical GlassWatch FeaturesWorld timeDual timeStopwatch1/100-second stopwatch Measuring capacity: 59'59.99'' Measuring mode: Elapsed timeAlarm/hourly time signalDaily alarmHourly time signalCalendarAuto-calendar (28 days for February)AccuracyAccuracy: 30 seconds per monthOther features12/24-hour formatRegular timekeeping: Analog: 2 hands (hour, minutes (hand moves every 20 seconds)) Digital: Hour, minute, second, pm, month, date, day