The connector is a male DC power jack, which means it is designed to be plugged into a female DC power socket. This type of connector is widely used in electronic devices for providing power input Male Jack Description 2.1 x 5.5mm CCTV Camera DC Power Plug Connector. DC Power Plug with plastic construction and strain relief. This 2.1 x 5.5mm Power Plug features one power connector end DC plug male to another end terminal for the CCTV camera connected. The internal diameter of the plug: is 2.1 mm. The external diameter of the plug: is 5.5 mm. Technical Details Connector Type: DC 5.5/2.1mm Connector Type: Male Contact Current Max. : 3A Connector-type DC mains Plug outside diameter 5.5 mm Plug inside diameter 2.1 mm Electrical mounting screw terminal Length of metal part 12 mm Spatial orientation straight