Kenwood KOS-A200 External Media Controller - Add Kenwood Audio to Your Car's Factory Stereo System | Perfect for Upgrading Car Audio & Playing Music on the Go

I added this to my 2006 Volvo S40, and now I can listen to music from my phone over the car's speakers, which is great. It works way better than the FM transmitters I had tried in the past--the audio quality is much better, and it's a sturdier product.Pros:This was really the only viable option for me, other than the low-quality FM transmitters, due to the audio setup in my particular car.It usually works well.Cons:Installation was a BEAST. I highly recommend that you take it to a professional to get it installed. It took more than a day to get all the wiring done properly, and removing the interior paneling in the car was a huge pain. Even when we were done, wires were hanging out of various places... It didn't look super great.Sometimes we get weird distortion/fuzz in the audio. This may just be due to the particular radio channel we picked, so we changed it recently to try to improve it, and it's been working out so far. This usually clears up on its own even when it does happen, and honestly, it's still better than what you'd get from an FM transmitter.Have I mentioned installation was an awful process? Seriously, use a professional.