... MP3/SD/USB pcb board with FM Radio(Mini audio board) Function and features:pcb board for MP3/SD/USB, fm radio and digital ... ,including around 5 R&D 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 and FM radio on multimedia speaker, mini speaker, active speakerRemarks: 1) More new ...