Features: Stainless Steel Case Textile Strap Automatic Movement Caliber: H-10 25 Jewels Sapphire Crystal Black Dial Analog Display Power Reserve Upto 80 Hours Hacking Function Nivachron Luminous Hands And Markers Screw Down Crown See Through Case Back Buckle Clasp 100M Water Resistance Approximate Case Diameter: 41.00 mm Approximate Case Thickness: 11.50 mm Approximate Lug Width: 20.00 mm