Mainly designed for the watch collector who keeps their watches in safe or vault. Operating for years and years with the 8 supplied Lithium "C" cell batteries. With battery life measured in terms of years, not months, there is no need for AC power. In addition to a main switch each winding head is individually powered with its own on/off switch, and operating mode switch. The rugged wooden case is covered with durable black vinyl material. Lockable black anodized aluminium door glazed with a break-resistant polycarbonate viewing panel. No door. 29.2 x 25.4 x 17.8 cm.