Features:Resin CaseBio-Based Resin StrapQuartz MovementResin CrystalBlack DialDigital Display1/100-Second StopwatchDaily AlarmHourly Time SignalLED LightAuto-Calendar12/24 Hours DisplayDay And Date DisplayScrewed Case BackBuckle ClaspSplash ResistantApproximate Case size (L Ã W Ã H): 38.2 Ã 35.2 Ã 8.5 mmApproximate Case Diameter: 35.20 mmApproximate Case Thickness: 8.50 mm