Features:Bio-Based Resin CaseBio-Based Resin StrapTough SolarMineral CrystalBlack DialDigital DisplayShock ResistantRadio Controlled Watch5 World Time31 Time Zones1/100 Second StopwatchCountdown Timer5 Daily AlarmsHourly Time SignalLED BacklightPower SavingRegular TimekeepingTime Calibration Signal ReceptionFull Auto Calendar12/24 Hours DisplayMonth, Day And Date DisplayScrewed Case BackBuckle Clasp200M Water ResistanceApproximate Case Size (L × W × H): 44 × 37 × 9.6 mmApproximate Case Diameter: 37.00 mmApproximate Case Thickness: 9.60 mm