Features: Resin Case Resin Strap Quartz Movement Resin Crystal Black Dial Digital Display Multi Time World Time 31 Time Zones 1/100 Second Stopwatch Countdown Timer 5 Daily Alarms Hourly Time Signal LED Backlight Afterglow Full Auto Calendar Button Operation Tone On/Off Regular Timekeeping 12/24 Hours Display Day And Date Display Screwed Case Back Buckle Clasp Splash Resistance Approximate Case Diameter: 33.7mm Approximate Case Thickness: 8.6mm