It was probably right there in the manual all along...this thing is about the equivalent of a bluetooth earpiece except that it stops the music...if you have a friend that has a stereo that imports the contact list, dials from the screen, etc. They do not have a NX409 or NZ409...the screen doesn't even know the phone is there until a call comes through. Don't even think about the possibility of putting your phone away and seeing the name come up on the screen.