I have an 07 Honda EX V6 with the Nav/XM multi disc radio and was looking for an interface to plug in an Ipod/phone. I researched the USA-Spec PA15 HON2. Picked it up off the internet and had a local auto stereo installer put it in. Great product. Allows you to play and control an Ipod/Iphone from your factory radio and steering wheel controls. I picked up and aftermarket Motorola bluetooth for my phone and I can speak to the radio thru my phone to change audio settings. This could be done anyway thru the standard radio but thru the car's system. But with the interface, I can control my phone and the radio and when a call comes in, the volume is turned down automatically, and when call is over, it returns back to music previously played.