Patented innovation - Every WOLF winder counts the exact number of rotations. All other winders estimate the number of rotations. Lock-in dynamic cuff: Patented lock-in dynamic cuff "locks" your watch into the rotator drum for a secure fit. Low density foam for all wrist sizes without putting pressure on your wristband. Exclusive: Back to start - your watch returns to the position it started in when the cycle is complete.Quad angled cover. Rotation options: 10 second start delay. Can be set between 300 and 1,200 TPD (rotations per day). Double the amount of TPD by selecting the bi-directional setting. Directional settings>: clockwise, counterclockwise and bidirectional. Power Reserve: 6 to 72 hours in increments of 6 hours Power Reserve setting to accommodate watches with a power reserve, giving the watch time to release stored energy before the vaping program begins. Battery: Option to run on AC power (universal adapter included) or D-Cell/lithium batteries (not included). Other: Fluted bezel, lock and key security, available in green with gold or black with gunmetal hardware. Storage: 1 winding module, 2 pieces of watch storage with suspended cushions, 1 open compartment. Dimensions: 19.7 cm L x 20.3 cm W x 24.77 cm H Material: Vegan leather