... Pcb with LED display -support SD / USB Card Reader,FM radio,LED display -MP3 decoder,pcb assembly -DC 5.0V,IN -power on/off Pcb with LED display( ... Mini audio board) Function and features:MP3/SD/USB Card reader, fm radio and digital screen display, with power ... FM radio speaker, mobile speaker, active speaker, tower speaker, stage speaker, ect.We can add USB/SD function and FM ...