Extend your XM Radio Receiver with the XM-EXT50, 50 foot XM antenna extension cable. This 50 foot extension cable can be used with many different XM Satellite Radio receivers (see list below). When combined with the 22.5 foot antenna cable that is attached to the XM Radio antenna (The same antenna that comes in many home kits and with some receivers) it allows you to install the XM antenna as far as 72.5 feet from the receiver with one extension cable. It also includes a weather proof cap for outdoor use.* Please note you can attached 2 extensions together for up to 122.5 feet of cable length (including antenna cable).