THESE UNITS ARE NEW AND HAVE NO VISIBLE SIGNS OF USE.  THESE FM EXTENDER ANTENNAS HAVE COME OUT OF ORIGINAL SIRIUS SATELLITE RADIO KITS.  THESE UNITS HELP WHEN FM MODULATING A SATELLITE RADIO IN A UNIVERSAL INSTALLATION. SUCH AS A CAR THAT DOES NOT HAVE AN AUXILIARY INPUT. THESE UNITS WILL HELP DRAMATICALLY WITH FM STATIONS CUTTING INTO YOUR SATELLITE RADIO.