... next songs,vol,Pla/Pau,repeat,mode Decoder Board with FM radio for SD card,usbFunction and features: SD/MMC/USB ... board, fm radio and digital screen display, memory function with remote control, and so on.Product No.: SW-005Technical ... buttons to control external audio volume-Application: Ordinary audio combination, Car audio, multimedia speaker, subwoofer, amplifier, electronic products and so ...