WOLF BRITISH RACING 4 PIECE WINDER | RivoliShop.com。Item No 793002 10.75\" L x 6.5\" W x 13.25\" H Patented Innovation - Every WOLF winder counts the precise number of rotations. All other winders estimate the number of rotations. Lock-in dynamic cuff: Patented lock-in dynamic 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 Directional settings: Clockwise, counter clockwise and bi-directional Power reserve setting: 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 winding program begins. Battery: AC power (universal adapter included) Other: Fluted bezel, lock and key security, available as green with gold or black with gunmetal hardware Storage: 4 winding modules