The transmitter meets my expectations fully. Above all, one does not need a separate MP3 player to and accordingly no tangles in the car. The sound is absolutely fine for me. The manual is poor, after several attempts, then it works but intuitive. 1.SD card or USB flash drive FAT32 format (each with 2 GB tested) and then populate with WMA or MP3 on your computer. Warning: There is no indication of the songs on the radio. The tracks are played in the order in which they are present on the storage medium. The track number is displayed on the transmitter. Infected 2.SD card into the slot or USB flash drive Search 3.Freie frequency on the radio, Syndicate FM transmitter into the cigarette lighter and the car radio-frequency - and you will hear music. The remote control allows a fast changing of tracks. However, one must thus pretty much "aim" on the transmitter Price / performance mix. It is an inexpensive solution for someone who has no MP3 player and want to hear your own music CD or without having a player and no possibility of connecting finds to the car radio or the car radio does not support MP3 tracks on CD.