Features:Resin CaseBio-Based Resin StrapQuartz MovementResin CrystalBlack DialDigital DisplayDual Time1/100-Second StopwatchDaily AlarmHourly Time SignalFull Auto-CalendarButton Operation Tone On/Off8-Digit Calculator12/24 Hours DisplayMonth, Day And Date DisplayScrewed Case BackBuckle ClaspSplash ResistantApproximate Case size (L × W × H): 43.2 × 34.4 × 8.2 mmApproximate Case Diameter: 34.40 mmApproximate Case Thickness: 8.20 mm