E-outstanding 12 Pair DC Power Jack (12 x Male and 12 x Female) 5.5mm x 2.1mm CCTV Power Jack Adapter 5.5mm x 2.1mm DC Jack Adapter For CCTV Power No Need Cutting and soldering The 2.1mm DC Plug features a DC 2.1mm plug and connector with mark polarity Professional for CCTV installers 12 x Male DC Adapter Connector + 12 x Female DC Adapter Connector