316L Surgical-Quality Stainless Steel Case Jeweled Automatic Movement Jewel Bearings: 21 Jewels 36-Hour Power Reserve Beats per Hour (BPH): 21600/Hour Sapphire-Coated Mineral Crystal Skeleton Dial Observation Caseback to View Movement Logo-Engraved Stainless Steel Crown 316L Surgical-Quality Stainless Steel Bracelet Logo-Engraved Stainless Steel Push-Button Butterfly Clasp Luminous Hands 45mm Case Width 150-230mm Wrist Size 5 ATM Water Resistance