316L Surgical-Quality Stainless Steel Case Japanese Miyota JS25 Quartz Movement Full-Function Chronograph Scratch Resistant Mineral Crystal Logo-Engraved Stainless Steel Caseback Uni-Directional Bezel Screw Down Crown Rubber Strap Logo-Engraved Stainless Steel Clasp Helium Release Valve Luminous Hands Luminous Markers Date Display 24-Hour Sub-Dial 45mm Case Diameter 20ATM Water Resistance (Professional Deep Diving Approved)