Features:Case/Bezel Material: ResinResin StrapResin/Spherical CrystalDigital DisplayLED LightIlluminator AfterglowMulti Time (4 Different Cities)World Map10 Year BatteryWorld Time31 Time Zones (48 Cities + UTC)1/100-Second StopwatchCountdown Timer5 Daily Alarms Or One-Time AlarmsHourly Time SignalFull Auto-Calendar (To Year 2099)12/24-Hour FormatButton Operation Tone On/OffRegular TimekeepingAccuracy: ±30 Seconds Per MonthDay DisplayBuckle Clasp100M Water ResistanceApproximate Size Of Case: 48.1 x 43.7 x 13.7mm