Features: case/bezel material: resin resin strap resin/spherical crystal digital display led backlight afterglow 10 year battery dual time chrono function am/pm display 1/100-second stopwatch multi-function alarm (one time or 7 time snooze) hourly time signal auto calendar (to year 2099) 12/24-hour format regular timekeeping accuracy: ±30 seconds per month day and date display solid case back buckle clasp 30m water resistance approximate size of case: 44.1 x 40 x 11.5mm