OTC 3177A Professional Memory Saver Saves the vehicle feets on-board diagnostic memory and other on-board memory components when the vehicle feets battery is removed or disconnected LED lights confirm circuit between the cigarette lighter/power outlet and the vehicle feets battery with the ignition on or off LED lights confirm circuit between the cigarette lighter/power outlet and the vehicle feets battery with the ignition on or off Cigarette lighter adapter for use with vehicles that do not have an OBD II connector High capacity rechargeable sealed lead acid battery for extended service between charges