Features:Resin CaseResin StrapSolar PoweredMineral CrystalBlack DialDigital DisplayLED BacklightSolar PoweredGPS Signal ReceptionMobile LinkTraining FunctionWrist Heart Rate MeasurementTraining Analysis And Training DataLife Log DataUser Profile CreationDigital CompassAltimeter, Barometer And ThermometerFlight ModeWorld TimeCountdown TimerAlarms With SnoozeFull Auto CalendarDay And Date Display12/24 Hours DisplayScrewed Case BackBuckle Clasp200M Water ResistanceApproximate Case Size (L × W × H): 54.6 × 55 × 20.4 mmApproximate Case Diameter: 55.00 mmApproximate Case Thickness: 20.40 mm