Features:Case/Bezel Material: ResinResin StrapResin CrystalDigital DisplayLED Light AfterglowChronograph Function1/100-Second StopwatchDaily AlarmAM/PM DisplayHourly Time SignalAuto-Calendar (28 Days For February)12/24-Hour FormatRegular TimekeepingAccuracy: ±30 Seconds Per MonthDay And Date DisplaySolid Case BackBuckle Clasp30M Water ResistanceApproximate Case Diameter: 37mmApproximate Case Thickness: 8mm