Features: Stainless steel Case Resin Strap Quartz Movement Caliber: 3421 Mineral Crystal Black Dial Digital Display Shock Resistant Flash Alert Electro Luminescent Backlight 1/100 Second Stopwatch Countdown Timer Hourly Time Signal Multi Function Alarm Regular Timekeeping Full Auto Calendar 12/24 Hours Display Month, Day And Date Display Screwed Case Back Buckle Clasp 200m Water Resistance Approximate Case Diameter: 42.8mm Approximate Case Thickness: 13.5mm Approximate Lug Width : 16mm