Features: case / bezel material: resin resin band quartz movement resin glass / spherical glass led light selectable illumination duration, afterglow multi time (4 different cities) world time 1/100-second stopwatch countdown timer measuring unit: 1/10 second 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 buckle clasp 100m water resistance size of case: 48.1 × 43.7 × 13.7mm