Etc. For Rock, Pop is the sound of the FM transmitter gut.Für lovers of classical music, it could, however, not be sufficient. It is also important that the radio dial starts at 87.5 MHz, as it will save you with this "universal frequency" frequent readjustment of the frequency. It is very important also to match the volume of the two devices (transmitter and radio) to each other. Is the transmitter set to silent, you have to turn on the radio too much and it roars. Is the transmitter too loud, the music is distorted and overdriven over. So quiet experiment to the settings! Since I am not a frequent callers, the sound quality in the mobile phone hands-free is good. Callers have not complained so far and I could also understand incoming calls good. Not outstanding (ie not for frequent callers) but good. Folder navigation works übrigends also: just press the forward button a little longer. Installation is extremely easy, my stick (4 GB) was easily detected. If you do not get to hear some MP3 files, it may be because they are in the outstanding 320 bit rate (such as back down loads at Amazon). I have not studied exactly when the transmitter detects the files, just have everything converted on the stick on 128er bitrate (not a problem as there is freeware that does this well). So fits approx 1/3 more to the stick / SD card! All in all a device that I would buy again! Only the Lenradfernsteuerung is unnecessary. You get not fixed wobble-free and from the steering wheel remote control is aimed rarely on the sensor to the transmitter.