Features: resin case resin strap tough solar caliber: 3540 mineral crystal black dial digital display shock resistant mobile link auto time adjustment easy watch setting approximately 300 world time cities time & place reminder phone finder 5 world time 1/100-second stopwatch countdown timer 5 daily alarms hourly time signal led backlight full auto-calendar button operation tone on/off power saving low battery alert regular timekeeping 12/24 hours display month, day and date display screwed case back buckle clasp 200m water resistance approximate case diameter: 42.8mm approximate case thickness: 13.4mm