I have the transmitter now since 3tagen and have to say on a normal stereo system he works without noise properly. the car is a noise to be heard, possible that it is because that is in place no radio near where the transmitter stops permanently. will continue to monitor the (hence the 4 Stars). I play with the transmitter, the songs on my phone Sony Xperia ray via car radio / stereo from. I would Recommend the transmitter if you have the possibility of a radio nearby shelf in the car, in which the transmitter does not constantly slip while driving.
