... mode Decoder Board with FM radio for SD card,usbFunction and features: SD/MMC/USB Card MP3 Decoder Board, pcb ... cableOptionAntenna wireOption More information:-Supporting SD/MMC Card and USB disk to play music-Support MP3,WMA format-With ... , it has such switching order as USB→SD→FM→USB; When only with USB flash drive, it has the switching ... press this button. Decoder Board with FM radio for SD card,usb