... .0V IN -mp3 decoder board MP3/SD/USB pcb board with FM Radio(Mini audio board) Function and features: ... pcb board for MP3/SD/USB, fm radio and digital screen display, with power on/off ... 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, ...