... board) Function and features:pcb board for MP3/SD/USB, fm radio and digital screen display, with power on/off switch, remote ... buttons to control external audio volume-Application: Ordinary audio combination, Car audio, multimedia speaker, subwoofer, amplifier, electronic products and so ... FM radio on multimedia speaker, mini speaker, active speakerRemarks: 1) More new designs are on the way 2) We do ...