Car MP3 FM Transmitter - Modulator with Steering Remote, USB key port and SD/MMC card slot FM Transmitter - Broadcast music from SSD/players to your car stereo system over FM Frequency. Blue LCD screen display song name, more beautiful and clear. 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 Includes Steering Wheel Remote, SD card not included