... add songs:1)Can connect the computer with USB2.0, add songs into the hard disk of machine ... . Aluminum panel ,there is a Power button ,a LED digital display window, The black background with white fonts.give you the ... signal port,MIC SCORE(Enternal scoring input port),USB2.0/ HOST USB(OTG) interface,VGA,IR,12V DC ... by two ways,active and passive. Connect USB2.0 port with USB line will become a Hard Disk ...