Bluetooth Handsfree FM Transmitter Car Kit MP3 Music Player Radio Jammer With Remote Control For iPhone Samsung LG Smartphone hands-free function, no need to answer the phone in the car holding a cell phone, driving safer, easier call. Full frequency car mp3, can read U disk, SD / TF card MP3 music inside. Rotating shaft joint design, rotation angle for easy viewing. CD dot matrix display, nice supports two simultaneous phone link Bluetooth Handsfree function: Full Duplex, DSP (Digital Signal Processing) Technology, CVC technology for echo cancellation and noise suppression