Features:Resin CaseResin StrapQuartz MovementCaliber: 3502Resin CrystalBlack DialDigital DisplayDual Time1/100-Second StopwatchCountdown TimerHourly Time Signal5 Multi-Function AlarmsLED BacklightFull Auto-CalendarRegular Timekeeping12/24 Hours DisplayMonth, Day And Date DisplayScrewed Case BackBuckle Clasp100m Water ResistanceApproximate Case Diameter: 51.3mmApproximate Case Thickness: 15.8mmApproximate Lug Width : 18mm