Features: case/bezel material: resin/chrome plated stainless steel bracelet quartz movement resin crystal digital display 1/10-second stopwatch countdown timer daily alarm hourly time signal auto-calendar (set at 28 days for february) regular timekeeping accuracy: ±30 seconds per month solid case back deployment clasp 30m water resistance approximate size of case: 30.4 x 26.7 x 7.3mm