Universal pcb Board -SD/USB,FM radio,LED -power on/off,last/next songs, volume, Pla/pau,repeat -DC5.0V ... features:pcb board for MP3/SD/USB, fm radio and digital screen display, with power on/off switch, remote control, and so ... , tower speaker, stage speaker, ect.We can add USB/SD function and FM radio on multimedia speaker, mini speaker, active speakerRemarks: 1 ...