Nixon Men's 'Unit Dive' Japanese Automatic Stainless Steel and Rubber Sport Watch, Color:Black (Model: A9622238-00) Custom LCD digital module with freediving functions, encased in a protective Poron housing for super tough shock absorption and durability 48mm, 100 meter/10atm Japanese-automatic Movement Case Diameter: 48mm Water Resistant To 100m (330ft): In General, Suitable for Swimming and Snorkeling, but not Diving