Electrix Adjustable Voltage Universal AC-DC Adapter 12V 9V 7.5V 6V 4.5V 3V with Detachable 6 Plugs UL Listed 300mA A/C to D/C adaptor, Use in 120V 60 Hz 12 V Output DC Volts: 1.5/3.0/4.5/6.0/7.5/9.0/12.0 Volts 6 different plugs Plug Gender: All Plugs are female (hole in the center of plug), Do not purchase this item if male plug is required. Easy switch to select Negative and Positive