Rado Men's R12639023 Original Divers Automatic Watch Importado Quality Automatic movement; Functions without a battery; Powers automatically with the movement of your arm Scratch-resistant-sapphire crystal Case diameter: 39 mm Stainless-steel case; Black dial; Date function Water resistant to 990 feet (300 M):suitable for scuba diving to a depth of 30 meters for up to 2 hours