... with FM radio for SD card,usbFunction and features: SD/MMC/USB Card MP3 Decoder Board, pcb board, fm radio and digital screen display, memory ... ;Short press it to search and save channels.2.“VOL-”: Can set VOL-, TIME-, ALARM-, and POWEROFF-.3.“VOL+”: ... +, ALARM+, and POWEROFF+.4.“MODE”: When this player works with SD card and USB flash drive together, it has such switching order ...