Car MP3 Player FM Transmitter with SD Slot and IR Remote -SD/MMC/USB Port/MP3
The volume was really, really low and poor quality (very tinny). The sound improved slightly if I tuned the transmitter .1 MHz higher than the radio frequency. After all of that, the thing stopped working with my MP3 player entirely after only a few minutes. I haven't tried it with the USB drive or SD card yet but that's not the purpose for which it was purchased. I'm going to try to return it and see what happens.