Description This product is a wireless FM transmitter car charger MP3 player for car charging. Adapting professional high performance module, and built-in mp3 make it capable of playing the music files in memory card, firing into the car stereo via wireless fm. Besides, during the connecting, play the phone's music and the fm transmitter to car audio, as the calls incoming switches to the speaker state, when call ends, it will switch back to music playing. The product with embeded echo cancellation micro phone, you can easily switch between music and phone calls. Feature - Color: Black - Material: ABS - Size: 13 x 10 x 3.5cm - version 4.0, support call, music transmission, caller number - Support TF / U disc player and reader function, support MP3/WMA format music - Double USB charging port 2.1A can expand the portable device function, suitable for all mobile phone, tablet and other electronic products charge - 1.3 inch LED dot matrix screen, display frequency point, file name, and working state information - Support one key menu setting language, playback mode, and sound mode - Support power failure memory and folder playback - AUX input and output function, open display voltage - One button switch, pause, listen / / listen / down key - FM emission frequency 87.5-108.0MHZPackage list: 1 x Car FM Transmitter MP3 Player