Features: Resin Case Resin Strap Quartz Movement Resin Crystal Black Dial Digital Display 1/100-Second Stopwatch Daily Alarm Hourly Time Signal LED Light Auto Calendar 12/24 Hours Display Regular Timekeeping Day And Date Display Screwed Case Back Buckle Clasp Splash Resistance Approximate Case Diameter: 30.4mm Approximate Case Thickness: 8.6mm Approximate Lug Width: 10mm