Pangaea S700 Single Automatic Metal Watch Winder Carbon Fiber (Battery Operated or AC Powered) Beautiful Carbon Fiber exterior with metal finish front. Compact for easy storage. Can be combine with other units. Bidirectional Motor: Clockwise; Counter Clockwise; Alternate Four Rotation Settings: 650, 750, 850, 1000 Turns Per Day Power by AC adapter (included) or Batteries (not included)