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