Female Jack Description:Description: No electrical tap, No splicing, no crimping, but only a small screw driver. Easier for camera installation, save time and more securer cable connection. 5.5mm x 2.1mm Female power plug connector. External diameter of the plug: 5.5mm. Internal diameter of the plug: 2.1mm. Dimension: 38mm(L) x 14mm(W) x 13mm(H).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 CCTV camera connected.It is a perfect solution for those who want to make custom power cable.This CCTV Camera DC Power Connector will provide a great connection.Internal diameter of the plug: 2.1mmExternal diameter of the plug: 5.5mmIt measures approx. 1.5' long, 0.55' wide, 0.5' thick.