Tom/Speedy - pretty much what Padgett said, and works pretty well with my Windows Phone, I can't speak for the others for certain. You do have to push the ****/rocker to the side to answer though, no hands-free answer AFAIK. There's a remote mic available for the M502 as well. I don't find the display obnoxious at night, maybe I can try to take a photo tonight. Pretty much needed a Scosche radio harness for an 86+ VW, a euro radio key, and a euro antenna adapter. I didn't do any soldering, but I did have to swap a few connections around on the wiring harness.