TAG Heuer Men's CAF2010.BA0815 Aquaracer Automatic Chronograph Watch Quality Swiss Automatic Movement; Functions without a battery; Powers automatically with the movement of your arm Scratch-resistant sapphire crystal Case diameter: 44.3 mm Stainless-steel case; Black dial; Luminous hands and hour markers; Day-date function; Chronograph functions Water resistant to 990 feet (300 M):suitable for scuba diving to a depth of 30 meters for up to 2 hours