Features: Case/Bezel Material: Resin Stainless Steel Bracelet Quartz Movement Mineral Crystal Digital Display 1/100-Second Stopwatch Chronograph Function Daily Alarm Hourly Time Signal Auto-Calendar 12/24-Hour Format Regular Time Keeping Accuracy: ±30 Seconds Per Month Day And Date Display Screwed Case Back Deployment Clasp 30m Water Resistance Approximate Case Diameter: 35.5mm Approximate Case Thickness: 6mm