Features: case / bezel material: resin resin strap mineral crystal digital display shock resistant mud resistant tough solar electro-luminescent backlight world time 31 time zones (48 cities + utc) 1/100-second stopwatch countdown timer 5 daily alarms (with 1 snooze alarm) hourly time signal battery level indicator power saving function full auto-calendar (to year 2099) 12/24-hour format button operation tone on/off regular timekeeping accuracy: ±15 seconds per month day display solid case back buckle clasp 200m water resistance approximate case diameter: 55.5mm x 53.6mm approximate case thickness: 17.5mm