Overview: It's a barrel connector. You can plug in a male RCA to both ends and it transfers the signal. Helpful for connecting multiple existing composite video cables and audio cables together to make longer cables without having to order new cables. These connectors are used to connect together RCA extension cords that have male connectors at both end . These items are great if you need to connect two male to male cords. With these adaptor/connectors, short audio and video cables with RCA male connectors can be extended if two devices happen to be a bit far away from each other. Handy addition to any cable installers RCA cable connectors parts bag because these RCA couplers are as handy as a pocket . Here are three QA for your reference Q:Well these work with component cables or composite cables? A:If your cables are RCA Male, these couplers will work. Q:Will this work for video? A: Yes, for both audio and video. Q:Could I use these to connect aux cables (3.5mm) ? A: Not without an adapter these are for rca cables! Package Contents: 2x female to female RCA adapters