Features: case/bezel material: resin resin strap resin crystal digital display led light afterglow chronograph function 1/100-second stopwatch daily alarm am/pm display hourly time signal auto-calendar (28 days for february) 12/24-hour format regular timekeeping accuracy: ±30 seconds per month day and date display solid case back buckle clasp 30m water resistance approximate case diameter: 37mm approximate case thickness: 8mm