A few years ago, few cars fitted with radios mp3 players, cd to wav files was then the standard of recorded music. It is to overcome this lack that SD card or USB drive has been created on a simple idea: to be paid in frequency as a radio station and become a new resort that becomes its own "jukebox". This gadget is equipped with two functions: FM transmitter and MP3 player (or other). The issuer must set frequency to find a free place station on FM (frequency adjustment is rather easy), if it is over a short distance, it is certainly feasible, but the competition is tough, both FM is crowded! It should then be very powerful to "turn" the remote station and monopolize the frequency .. this is not the case, it sizzles, it hesitates. I was fine to look for a quiet corner and devoid of FM station, not found, at least not with long haul road alternately, highway and city. The manual recommends in this case, to undo the antenna, big deal! I tried to approach the antenna the device by connecting it to the back, the chest being equipped with a cigarette lighter. It's a little better but then impossible to remotely control the machine, the remote is infrared !! Regarding the quality of the player, difficult to judge, mostly these are crackling or crachotis that disrupt reading. All this is very poor ...