Features: resin case resin strap quartz movement mineral crystal black dial analog digital display digital compass double led light low temperature resistant mobile link altimeter barometer thermometer world time stopwatch countdown timer 5 daily alarms hourly time signal full automatic calendar luminous hands day and date display 12/24 hours display am/pm display accuracy: ±15 seconds per month screwed case back buckle clasp 100m water resistance approximate case diameter: 51mm approximate case thickness: 16mm