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 ... and USB disk to play music-Support MP3-With FM radio- With digital display- Support display of date and time ... have any problems, please feel free to contact with us.pcb Pcb with LED display