This connector allows you to convert your Sirius or XM Radio antenna into RG6 COAX cable for longer cable runs. The end of the satellite radio antenna plugs into the small SMB Jack on the plug and an F Connect (RG-6) make screws into the other end. This is perfect for professional grade SIRIUS XM Satellite Radio installations and should be used to replace an existing connector or in conjunction with the FCJACK RG6 F Connector to SMB Adadpter Connector.