If you need to add more feet to your satellite radio antenna then this is the cable you need. Use one of these cables to extend the cable for a Sirius or XM Satellite Radio antenna. Works with all receivers, docks, cradles, and boomboxes. The cable has high quality straight connectors on each end. One end connects to the antenna cable and the other end connects to the antenna port on your receiver, dock, cradle, or boombox.