No, the N800 has no FM transmitter. It does have an FM receiver. I have no noise problems with my N800 connected to power. I seldom use it for audio, though, because I already have an overload of ways to play music through my speakers. I have a Sony MEX-2500, and almost never use the A2DP, preferring the wired aux input, because most of my devices don't have bluetooth, and I prefer to connect my phone via bluetooth. The Sony provides lots of ways to get sound, and it was a bargain at ~$150 installed. My only regret about it is that it has no USB or SD input. Oh well...