TAG Heuer Men's CW2111.FC6177 Monaco Automatic Chronograph Watch Quality Swiss Automatic Movement; Functions without a battery; Powers automatically with the movement of your arm Scratch-resistant Perspex crystal, a type of acrylic/plexiglas Case diameter: 38.5 mm Stainless-steel case; Black dial; Luminous hands and markers; Date function; Chronograph functions Water resistant to 99 feet (30 M): withstands rain and splashes of water, but not showering or submersion