This Wolf Designs Viceroy single watch winder is made of black vegan leather. The winding module can be set to turn between 300 and 1,200 times per day with clockwise, counterclockwise, or bi-directional rotation. Settings include an adjustable power reserve function from 6 to 72 hours and a 10 second start delay. The winder runs on AC power with the included adaptor, or by D-Cell/Lithium batteries. Batteries not included.