Car MP3 FM Transmitter, with USB key and SD-MMC card slot, 2Gb build in, 1.5 inch TFT screen FM Transmitter - Broadcast music from SSD/players to your car stereo system Remember the last frequency and music, track and recall them when restarting Excellent sound quality with D.S.P solution for echo cancellation & noise suppression Transmit frenquency 87.5-108MHz/Voltage 12-24V Optional Steering Wheel Remote