... /mp3/audio/hot sell transmitter/low price transmitter/car audio mp3; full function fm transmitter fm transmitter product details: ... SD/MMC card, transmit music signal over car FM tuner, then enjoy music via car stereo.2).Support external audio player (MP3 ... , etc).3) Draw power from the cigarette lighter in the car (DC12V power).4).Rotary joint design more convenient to adjust ...