Features: case/bezel material: resin stainless steel bracelet resin crystal digital display chronograph function led backlight afterglow 1/100-second stopwatch daily alarm am/pm display hourly time signal auto-calendar (auto calendar set at 28 days for february) 12/24-hour format regular timekeeping accuracy: ±30 seconds per month day and date display solid case back fold over clasp 50m water resistance approximate size of case: 43.1 x 41.2 x 10.5mm