Valley Enterprises 2.1mm x 5.5mm DC Power Coupler Female to Female Go to amazon.com Related posts Top 10 best dc plug female FeatureFor connecting two Male 2.1mm x 5.5mm DC power plugs togetherVoltage Rating: Up to 36Volts DescriptionFor connecting two Male 2.1mm x 5.5mm DC power plugs togetherVoltage Rating: Up to 36Volts