This watch winder is made with solid wood and comes with 100-240V AC adapter. Features : Four turntables each can be set to different settings. Automatically rotates the watches in the set direction and set Turn Per Day (TPD) settings. Adjustable TPD range from 650 to 1000, with intermediate rest cycle to eliminate potential stress to the watch movement. Rotates clockwise, counter-clockwise or alternate. Automatic timer will turn itself on the next day at the same time. No human intervention needed. Piano finish black exterior; Glass door, Polished with multi layers of polyurethane.