Features: case / bezel material: resin / aluminum resin strap mineral crystal tough solar shock resistant double led light hand shift feature super illuminator world time 31 time zones (48 cities + utc) 1/100-second stopwatch countdown timer 5 daily alarms hourly time signal full auto-calendar (to year 2099) 12/24-hour format button operation tone on/off regular timekeeping accuracy: ±15 seconds per month luminous hands buckle clasp 200m water resistance approximate size of case: 55.1 x 52.5 x 16.7mm