WOLF ' Heritage' Automatic Watch Winder (Model: 270102) 2 winding modules, 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 Watch Cuff: The cuff has been designed to fit bigger and heavier watches (up to 52mm case). The new design "locks" the cuff into the rotator drum for a secure fit