Add XM radio to your Pioneer AVIC head unit. I bought this for $80. Used it twice. Works perfectly, I just switched my head unit for Kenwood so now I'm stuck with this. A bargain at $50 including shipping. As an added bonus I painstakingly shortened the data cable, soldering and shrink-tubing for a neat result. Eliminated miles of extra wire so it will fit neatly behind your AVIC.