Jacques Lemans Men's Automatic Stainless Steel Casual Watch(Model: GU137G) Quality automatic movement; functions without a battery; powers automatically with the movement of your arm Scratch-resistant-sapphire crystal Case diameter: 43 mm Stainless-steel case; dark brown dial; day-and-date functions Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving