* High Fidelity, Stereo: --- This device can modulate the audio frequency signal of CD, MD, MP3, MP4, PDA, Notebook, PC etc. to FM signal (87.0~108.5MHz). With the stereo tune you can enjoy listening high quality music anywhere. * DIGITAL PLL: --- With DIGITAL PLL, wave signal transmission and reception will not be affected even in places subject to extreme change in temperature. In addition, using the digital tune can avoid the fussy frequency modulation. * Powered by batteries or the car"s power source. * Full frequency range design can effectively avoid interruption.