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 on/off ... ) If you have any problems, please feel free to contact with us.pcb Pcb with LED display