WOLF ' Cub Single Watch Winder with Cover, Black' Metal and Leather Automatic (Model: 461103) 1 winding module, glass cover and 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. Bi-directional setting Battery or Power Option with Universal Power adapator 2 year Manufacturer warranty worldwide