WOLF Unisex 461203 Wolf Cub Double Black Analog Display Watch Winder with Cover 2 winding modules, 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