Universal pcb Board -SD/USB,FM radio,LED -power on/off,last/next songs, volume, Pla/pau,repeat - ... board) Function and features:pcb board for MP3/SD/USB, fm radio and digital screen display, with power on/off switch, remote ... StaffProduct Line: mini Card& USB reader speaker, portable FM radio speaker, mobile speaker, active speaker, tower speaker, stage speaker, ect.We can add USB/SD function ...