Features: case/bezel material: resin resin strap quartz movement mineral crystal black dial analog digital display double led light mobile link dual time 1/100-second stopwatch countdown timer 5 daily alarms hourly time signal auto time adjustment (four times a day) full auto calendar 12/24 hours display accuracy: ±15 seconds per month screwed case back buckle clasp 100m water resistance approximate size of case : 49.6 × 41.4 × 12.6mm