XM Sirius satellite with antenna. made by Audiovox. Plugs into the cigarette lighter and with a fm modulator transmits the signal to your radio. all you have to do is run the antenna, plug into a 12v outlet. no other wiring needed. get the radio code from the satellite and get service from Sirius or buy a card from best buy and to activate the radio.
I have two of these. bought these two satellite radios and then upgraded to a portable pioneer unit with that plays through a aux cable. one does not include the antenna.
upgraded antennas can be had for cheap offline.
XM Sirius satellite with antenna
:link to the craigslist ad with photos.