TAG Heuer Men&#39;s WV2115.BA0787 Carrera Calibre 7 Twin Time Automatic Black Dial Steel Bracelet Watch Quality Swiss Automatic Movement; Functions without a battery; Powers automatically with the movement of your arm Scratch-resistant sapphire crystal with sapphire exhibition back Case diameter: 38.2 mm Stainless-steel case; Black dial; Luminous hands and markers; Date function; GMT function; 24-Hour markers on bezel Water resistant to 99 feet (30 M): withstands rain and splashes of water, but not showering or submersion