Features: case/bezel material: resin resin strap quartz movement mineral crystal silver dial analog digital display shock resistant led light world time 1-second stopwatch countdown timer daily alarm hourly time signal hand shift feature full auto-calendar (to year 2099) 12/24-hour format button operation tone on/off regular timekeeping accuracy: ±30 seconds per month day display solid case back buckle clasp 100m water resistance size of case: 48×44.3×15.5mm