Features: case/bezel material: resin resin strap quartz movement mineral crystal digital display shock resistant led backlight afterglow (super illuminator ) mobile link (wireless linking using bluetooth®) step counter dual time 1/100-second stopwatch countdown timer 5 daily alarms hourly time signal full auto-calendar (to year 2099) 12/24-hour format regular timekeeping accuracy: ±15 seconds per month day and date display pull/push crown solid case back buckle clasp 200m water resistance approximate size of case : 54.1 x 48.6 x 15.5mm