Wolf Designs Module 2.5 Windsor Single Watch Winder with Cover, Black Preset at 900 Turns Per Day Lock-In cuff that can accommodate a wrist in excess of 10" Runs on either 3.3V Adapter (included) or D-Cell Batteries (not included) Rotation Options- Clockwise, Counter-clockwise or Bi-directional Patented rotation programs- Intermittent rotation, preprogrammed pause and sleep phases