Features:Bio-Based Resin CaseBio-Based Resin StrapQuartz MovementMineral CrystalBlack DialDigital DisplayShock Resistant1/100-Second StopwatchCountdown TimerHourly Time SignalMulti-Function AlarmFlash AlertLED BacklightAfterglowFull Auto-Calendar12/24 Hours DisplayMonth, Day And Date DisplayScrewed Case BackBuckle Clasp200M Water ResistanceApproximate Case size (L × W × H): 53.2 × 50 × 18.7 mmApproximate Case Diameter: 50.00 mmApproximate Case Thickness: 18.70 mm