Product Detail Quality 21-jewel Japanese-automatic Miyota movement; functions without a battery; powers automatically with the movement of your arm Durable mineral crystal Case diameter: 40mm Stainless-steel case; black dial; date function; luminous hands and markers Water-resistant to 660 feet (200 M) . The "Invicta Men's 8926 Pro Diver Collection Automatic Watch" is best product for you. We recommended Invicta Men's 8926 Pro Diver Collection Automatic Watch