Features: 1.Clear Protection Cover: Automatic watch winder adopts panoramic window protection cover with rotating face cover, safe isolation, strengthened energy gathering, multiple protection. 2.Quiet Motor: Automatic watch winder adopts a new generation of constant speed mute motor, the rotation speed is uniform and stable, fully enclosed design, reduce vibration, quiet operation. 3.Anti Magnetic Design: Watch winder adopts anti magnetic design, more than 5cm distance to block the magnetic field does not hurt the watch, to ensure that your watch movement is not affected by the magnetic field, so that your watch is always accurate and on time. 4.Dual Power Supply: The back with USB power socket (with USB interface socket and other equipment) computer interface, mobile power, rear battery groove, the back with battery installation port, placed 1 AA dry battery. 5.Exquisite Decoration: It is automatic single watch winder, also a beautiful ornament, practical and beautiful, perfect integration into your modern home style. specification:Item Type: Automatic Watch Winder Material: ABS Size: Approx. 140x140x150mm / 5.51x5.51x5.91in Use: Watch Winder, Ornaments Battery: 1 x AA Battery (Shipped Without Battery) PackageList:1 xAutomaticWatchWinder 1 x USB Cable 1 x English Manual NoteManual measurement please allow some error.