Sony DCC-127A car power adapter and voltage stabilizer. It plugs into the vehicles cigarette lighter jack to power your Sony ICF-7600 from the car's battery. Input is 12 VDC. There is a 3-position, moveable tap screw to select output voltage can be selected at 3 VDC (350 mA), 4.5 VDC (500 mA) or 6 VDC (600 mA). To change voltage loosen the tap screw and move to the desired voltage. The center conductor is negative [-].