Features: resin case resin strap mineral crystal blue dial analog digital display step tracker neobrite shock resistant double led light mobile link (bluetooth) dual 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: 41mm approximate case thickness: 13mm