The Qualiltät comparable to that of a radio station, maybe a little bit more background noise. In music you hardly notice this in audio books already, but not that it bothers or distracts. If one chooses the frequency well, you never have to readjust on journeys lasting several hours. Automatically turns on with the source and (if operated via the cigarette lighter) from.
Has worked flawlessly in all getesten vehicles.
Is the sound clear better than a previously used by me FM transmitter to one einschleift in the antenna line, but can not get a good mounting solution via AUX input or CD changer input to it - but that's at Car anyway impossible.
Would buy the AudiaX anytime.