Tools Powerbuilt | Powerbuilt Self Powering Computer Memory Keeper Battery Operated 648539

For Maintaining Voltage Continuity To Engine Computer, Clock And Radio Memory When Vehicle Battery Is Disconnected. Retains Radio Presets, Ecm Codes And Learned Procedures Up To Four Hours. Plugs Into Vehicle”S Cigarette Lighter Outlet. Uses 9-Volt Battery (Not Included).