Sirius XM Radio 40 foot Antenna Extension Kit with RG-6 COAX Converters for Universal Fit Universally Compatible Works with most models of Sirius and XM Satellite Radio receivers when using a home or vehicle cradle. Complete Kit Includes connectors to convert from Sirius or XM Antenna to RG-6 and convert from RG-6 to SMB to connect to the satellite radio antenna port. Please note: The connector for cable will not work with some boomboxes that have the plastic cover around the antenna port.