Features: Resin Case Resin Strap Quartz Movement Caliber: 3502 Resin Crystal Black Dial Digital Display Dual Time 1/100-Second Stopwatch Countdown Timer Hourly Time Signal 5 Multi-Function Alarms 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: 51.3mm Approximate Case Thickness: 15.8mm Approximate Lug Width : 18mm