Features: case/bezel material: resin/stainless steel black ip stainless steel bracelet mineral/resin crystal digital display led backlight afterglow flash alert am/pm display 1/100-second stopwatch countdown timer multi-function alarm hourly time signal full auto-calendar (to year 2039) 12/24-hour format regular timekeeping accuracy: ±30 seconds per month day and date display solid case back deployment clasp 50m water resistance approximate size of case: 38.9 x 35 x 9.4mm