Features: case/bezel material: resin resin strap quartz movement mineral crystal black dial analog digital display dual time 1/100-second stopwatch daily alarm hourly time signal auto-calendar (28 days for february) 12/24-hour format regular timekeeping accuracy: ±30 seconds per month day display solid case back buckle clasp 50m water resistance approximate size of case: 45 x 38.6 x 9.5mm