2.1mm X 5.5mm Female to Female DC Coupler Barrel Jack Power Connector Plug Adapter For LED/CCTV
2.1mm x 5.5mm DC CCTV Power Cord Coupler
Connect two male DC power plugs or two cables together using this coupler
Great for adding an extension to your existing cable
5.5x2.1mm is the most common barrel connecter used for LED lighting, CCTV equipment, computer and network equipment, and more.
This coupler also works with most 5.5x2.5 DC plugs.