WOLF 270402 Heritage Double Watch Winder with Cover and Storage, Black 2 winding modules, 2 piece watch storage, travel case, glass cover, chrome finished hardware, lock in cuff Patented Innovation - Every WOLF winder counts the precise number of rotations. All other winder estimate the number of rotations. Pre-programmed - 900 turns per day. Directional Settings: Clockwise, Anticlockwise and Bi-directional Battery or Power Option with Universal Power adapator 2 year Manufacturer warranty worldwide