Features: Resin Case Bio-Based Resin Strap Quartz Movement Caliber: 3550 Resin Crystal Grey Dial Digital Display 1/100-Second Stopwatch Daily Alarm Hourly Time Signal LED Backlight Full Auto-Calendar Month, Day And Date Display Screwed Case Back Buckle Clasp Splash Resistant Approximate Case Diameter: 24.1mm Approximate Case Thickness: 9.1mm Approximate Lug Width: 14mm