Features: Equal to the car CD player in function, not use CD disk, but play the music in u-disk/SD/MMC loading free from internet. 1.Change audio signal into FM signal and transmits wirelessly. You could enjoining mp3 music in u-disk via car radio without earphone. 2.Change audio signal into FM signal and transmits wirelessly. You could enjoining mp3 music in u-disk from car radio without earphone. 3.Car wireless patent technology: making the disturbance from outside, the sound effect is wonderful; 4.Car sound transfer: Two interface for mp3 5.Connected to many frequency equipments, like MP3PDACDDVPortable DVD etc. 6.Good memory function: can remember the song played last time. 7.Support MP3 etc format. 8.With SD/MMC reader, support SD/MMC card too. 9.flash disk,sd/mmc card as mobile memory. 10.Radiation distance: 3-5 meter( best effect )