Timex Men's T2M516 Sport Luxury Automatic Stainless Steel Bracelet Watch Quality Automatic movement; Functions without a battery; Powers automatically with the movement of your arm Watch does require battery to operate, watch powered by the movement of your arm Strong mineral crystal helps protects dial from scratches Stainless-steel case; Black dial; Date function Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving