This FM transmitter disqpose remarkably transmit power that lets you listen comfortably on any radio and / or car stereo MP3 content and / or WMA a walkman, a USB key; an SD memory card (the most practical option). For example, on a simple SD cart 8GB low end (transfer index 2), because here the speed of transmissin matter (unlike the photo), I could load all of my recordings MP3 and WMA current or thousands of songs (the equivalent of 11 CDs). Therefore, the finished CDs, réinscroptible or not, that make the soul more or less imminent, which scratch so easily and complicated to update. Well done to the economy is thus added space savings result. Only drawback, but size, the supplied remote was out of order, on 2 copies I had ordered. The LED transmission was depressed, when it should be clearly visible. In view of my Christmas presents, I bought a store troisème (50% more) and I could found that many copies were suffering this defect. but there I was able to choose a model with a remote control in working order.