We sell the cheap FM transmitter. 1> Adopts 3-D sound coding technology, which maintains the hi-fi effects of MP3 Players, MD players, CD players and TV sets. 2> Developed from frequency phase lock loop technology, which ensures stable Frequency radiation while functioning at a distance of up to 30MT in dead areas. 3> It can change audio signals into frequency modulation signals and transmit them Wirelessly to the sound box of the car and play without changing any original Equipment. 4> Convenient and economical 5> FM radiation section 6>Operating distance: Up to 30m 7>Separation degree from right to left:70dB 8>Working current:15mA 9> Input frequency:20Hz - 18kHz 10> Output frequency: FM107.7MHz