Features: Resin Case Resin Strap Quartz Movement Mineral Crystal Digital Display Chronograph Function Illuminator LED Backlight 1/100 Second Stopwatch Daily Alarm Hourly Time Signal Automatic Calendar Day And Date Display 12/24 Hours Display AM/PM Display Accuracy: ±30 Seconds Per Month Screwed Case Back Buckle Clasp 50M Water Resistance Approximate Case Diameter: 41mm Approximate Case Thickness: 10mm