FM transmitter utilize the imported nut CMOS chip which can switch the audio-frequency singal to frequency modulation singal, make it more fleetly and conveniet to realized the wireless connection of digital display and vehicle or family acoustics. You will enjoy a vivid digital music world on condition that you just insert the FM transmitter to MP3 or any other acoustics earphone jack such as PDA, IPOD, CD or boxed tape display, or you can connect the transmitter to computer, it can adjust dimensional sound system to clear FM frequency.