It literally is a plug n play! There’s no instructions on how to install it and it comes with 2 different harnesses. At first when I installed it, it didn’t turn on, until I removed the little brown module from the other harness and attached it to the harness that fits my vehicle part. You just remove the vents from the other car part and screw it onto the plug n play part where the vents are. You also remove the air conditioner controller from the previous car part and screw it onto the plug n play.Then you start to attach the harness and it turn on your vehicle. That’s when the android interface turns on and it works!Again, if yours doesn’t turn on, attach the brown module to the harness that fits your vehicle’s harness and it will work like a charm. Again, there’s no instructions on that and I had to figure it out. The brown module can be removed from the other harness by gently pressing on the button that connects it and then it releases.I am happy that I can hear music from my vehicle again and I didn’t want to pay someone to install it either. And I’m a female that did it myself!