... -Free Communicating and Mobile Bluethooth Stereo Music Player System *Bluetooth Mirror + TTS + Phonebook + Car MP3 + Earpiece + FM • Features:1 ... transmitter,frequency(88.1~-107.9MHz) selection, digital display mirror display frequency, RF output stably, more frequency for selection, ... increase the safety.12,Directly hook on the back mirror, without occupation of space, thoroughly overcome the trouble ...