Features:Resin CaseBio-Based Resin StrapQuartz MovementCaliber: 3550Resin CrystalGrey DialDigital Display1/100-Second StopwatchDaily AlarmHourly Time SignalLED BacklightFull Auto-CalendarMonth, Day And Date DisplayScrewed Case BackBuckle ClaspSplash ResistantApproximate Case Diameter: 24.1mmApproximate Case Thickness: 9.1mmApproximate Lug Width: 14mm