Sirius Car Vehicle FM Transmitter Antenna FEA25A.

it is an FM transmitter antenna for extending the FM signal on the receiver.

Plug this into your "FM out" on your vehicle dock for static free FM transmitting to your vehicle's radio.

You must have an FM OUT on your dock to get it working!

will work on SIRIUS dock: Stratus 3/4/5/6/7/8, Starmate 3/4/5/6/7/8, Sportster 3/4/5/6/7/8, SV3, UC8, SUPV1