Features: Resin Case Resin Strap Quartz Movement Caliber: 3551 Resin Crystal Black Dial Digital Display Approx. Battery Life: 3 Years On Cr1616 Multi Time World Time 1/100-Second Stopwatch Countdown Timer Led Backlight Full Auto-Calendar Button Operation Tone On/Off 12/24 Hours Display Month, Day And Date Display Screwed Case Back Buckle Clasp Splash Resistant Approximate Case Diameter: 33.7mm Approximate Case Thickness: 8.6mm Approximate Lug Width : 22mm