TAG Heuer Men's CAF2120.BB0816 Aquaracer Automatic Chronograph Two-Tone Watch Quality Swiss Automatic Movement; Functions without a battery; Powers automatically with the movement of your arm Scratch-resistant sapphire crystal Case diameter: 42 mm Stainless-steel case; Silver dial; Luminous hands and markers; Unidirectional bezel; 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