316L Surgical-Quality Stainless Steel Case Jeweled Automatic Movement Jewel Bearings: 20 Jewels 42-Hour Power Reserve Beats per Hour (BPH): 21600/Hour Sapphire-Coated Mineral Crystal Skeleton Dial Observation Caseback to View Movement Crown Protector Case Design 316L Surgical-Quality Stainless Steel Bracelet Logo-Engraved Fold-Over Push Button Deployment Clasp Luminous Hands Luminous Markers 41mm Diameter 5 ATM Water Resistance