Features:Resin CaseResin StrapQuartz MovementResin CrystalBlack DialDigital DisplayMulti Time World Time31 Time Zones1/100 Second StopwatchCountdown Timer5 Daily AlarmsHourly Time SignalLED BacklightAfterglowFull Auto CalendarButton Operation Tone On/OffRegular Timekeeping12/24 Hours DisplayDay And Date DisplayScrewed Case BackBuckle ClaspSplash ResistanceApproximate Case Diameter: 33.7mmApproximate Case Thickness: 8.6mm