WOLF Resin and Wood Automatic Watch Winder (Model: 454670) 2 winding modules, 6 piece watch storage, Piano Black wood frame, locking glass cover, lock in cuff Patented Innovation - Every WOLF winder counts the precise number of rotations. All other winder estimate the number of rotations. Fully controllable from 300 to 1200 turns per day - Clockwise, Anticlockwise and Bidirectional Battery or Power Option with Universal Power adapator 2 year Manufacturer warranty worldwide