Patented Innovation - Every WOLF winder counts the precise number of rotations. All other winders estimate the number of rotations. Rotation: 10 second start delay, 900 TPD (Turns Per Day), patented rotation programs - Intermittent rotation with pause and sleep phases pre-programmed. Directional Settings: Bi-directional Battery Option: Option to run the unit on AC power (universal adapter included) or AA batteries - alkaline or lithium (lithium batteries will last twice as long as alkaline batteries). Batteries not included. Single Winder