Features: Stainless Steel Case Rubber Strap Quartz Movement Caliber: ETA G10.212 4 Jewels Sapphire Crystal Blue Dial Analog Display Chronograph Function Luminous Hands And Markers Date Display Uni-Directional Bezel Screw Down Crown Screwed Case Back Buckle Clasp 300M Water Resistance Approximate Case Diameter: 45.5mm Approximate Case Thickness: 12.8mm