Features: Resin Case Resin Strap Quartz Movement Mineral Crystal Black Dial Digital Display Shock Resistant 1/100 Second Stopwatch Countdown Timer Multi Function Alarm Hourly Time Signal Flash Alert LED Backlight Regular Timekeeping Full Auto Calendar 12/24 Hours Display Day And Date Display Screwed Case Back Buckle Clasp 100m Water Resistance Approximate Case Diameter: 37.9mm Approximate Case Thickness: 11.3mm