... edited and played freely. And therealso is Aux input for external audio sources, Auxiliary devices such as MP3players, Portable DVD players, ... wheel. . Support USB Disk, SD Card and 3.5mm jack input. . Widely extends external audio sources, such as: PC, MD, ... for different car . No signal interfere, No battery required . Easy to install and use . AUX IN&BLUE TOOTH Port: Auxiliary input device can ...