Avoid satellite radio signal dead zones and improve your reception with the Tram® 7721 satellite radio magnet-mount antenna. This antenna is compatible with both Sirius® and XM® satellite radio services and provides an extended range when traveling. The antenna comes with a double-sided adhesive pad for permanent mounting. It also includes a 21 ft. super-heavy-duty RG174 coaxial cable with a right-angle SMB-female connector for superior performance..