Features: Case/Bezel Material: Resin Resin Strap Resin Crystal Digital Display LED Light Afterglow Chronograph Function 1/100-Second Stopwatch Daily Alarm AM/PM Display Hourly Time Signal Auto-Calendar (28 Days For February) 12/24-Hour Format Regular Timekeeping Accuracy: ±30 Seconds Per Month Day And Date Display Solid Case Back Buckle Clasp 30M Water Resistance Approximate Case Diameter: 37mm Approximate Case Thickness: 8mm