Elaboration: This is a MP3 Player special used in a car. It can download MP3 Formats file from the computer directly and save it in outside flash memory such ad USB disk or MP3 player. Qualified CMOS chip is used to decode music format file into audio frequency signal, then through stereo chip It is transferred to FM high frequency signal, and music be played by FM radio of Car. Character and Function: 1. Standard USB1.1/USB2.0, with high speed transmission; 2. Decode the format of MP3 files; 3. Three buttons with six functions ; 4. Can transmit external audio sources (CD/MP3 player) through audio signal input jack; 5. Digital switch with one key controls frequency adjustment that is more easy to switch between the frequency 87.7/ 87.9/ 88.1/ 88.3/ 88.5/ 88.7/ 88.9MHz (7 stations); 6. External magnetic antenna makes sure to listen good music with low noise normally on the area of strong signal; 7. Power from Car lighter directly (DC9-28V), can be used in any car; 8. No need to change any device of car. Plug and play