The SIRIUS FM Antenna Extension Cable slightly enhances the quality of FM transmission from your SIRIUS Satellite Radio Receiver to the radio in your vehicle. By placing the FEA25A in the front or rear window of your vehicle, it will bring the FM Transmission physically closer to the FM Antenna. It connects to any SIRIUS Radio that has a FM Output jack.
NOTE: We only recommend this device for situations where no other hard-wiring options will work. It's not nearly as effective as the FM Direct Adapter or Auxiliary Input Adapter.