The WOLF watch winder has been designed for storing and winding all automatic watches. The size of this watch winder is 26cm (L) x 15.40cm (W) x 14.80cm (H). It features: Patented innovation - Every WOLF winder counts the precise number of rotations. All other winders estimate the number of rotations / Lock-in Cuff: Patented lock-in cuff ‘locks’ your timepiece into the rotator drum for a secure fit. Low density foam to accommodate all wrist sizes without putting pressure on your bracelet / 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. / Storage: 2 winding module.