Magico Men's Automatic Stainless-Steel-and-Carbon-Fiber Casual Watch(Model: MAGICO-W51562O/W) Quality Automatic movement; Functions without a battery; Powers automatically with the movement of your arm Mineral crystal Case diameter: 43 mm Stainless-steel case; Silver-carbon-fiber dial; Date function Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving