TAG Heuer Men&#39;s CAF2012.BA0815 Aquaracer Automatic Chronograph Stainless Steel Watch Quality Swiss Automatic Movement; Functions without a battery; Powers automatically with the movement of your arm Scratch-resistant sapphire crystal with anti-reflective treatment Case diameter: 43 mm Stainless-steel case; Blue dial; Luminous hands and hour markers; Unidirectional bezel; 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