With the help of this MP3 Wireless FM Transmitter you can listen to MP3 files in your car via an SD or MMC card slot or USB flash memory! This 3 in 1 in-car cigar style FM transmitter supports 206 FM channels and has an SD/MMC card slot and a USB port so you can listen to your MP3 files on the road! Simply plug into your car's cigarette plug turn on your car stereo and tune to the same frequency! Plug in an SD/MMC card USB flash drive and even an MP3 player and listen to your favorite music on the go! The LCD displays the volume and name of the song!