Features: case/bezel material: resin/stainless steel stainless steel bracelet mineral crystal digital display led light afterglow 10 year battery multi time (4 different cities) world time 31 time zones (48 cities + utc) world map 1/100-second stopwatch countdown timer am/pm display 5 daily alarms hourly time signal full auto-calendar (to year 2099) 12/24-hour format button operation tone on/off regular timekeeping accuracy: ±30 seconds per month day and date display solid case back deployment clasp 200m water resistance approximate size of case: 52.2 x 47.7 x 16mm