TAG Heuer Men's CT511A.BA0564 Calibre 36 Link Automatic Chronograph Watch Quality Swiss Automatic Movement; Functions without a battery; Powers automatically with the movement of your arm Double-sided anti-reflective, Scratch-resistant sapphire crystal; Luminescent hands and hour markers Solid 43-mm stainless-steel case; Screw down case back with sapphire crystal exhibition window; TAG Heuer S Link stainless-steel bracelet Chronograph functions with 1/10th second timing capability; Tachymeter inner chapter ring; Date function between 4 and 5 o'clock Water resistant to 660 feet (200 M): suitable for recreational scuba diving