... High-efficience professional digital vedio amplifier.(5) USB, SD card, FM, remote control, LED display 2.0 professional loudspeaker.(6) USB ... laptop , mp3, mp4,CD, mobile phone.5,Built-in FM tuner,auto scaning,FM function with frequency range 87.5-108MHZ6,Function: Support ... SD and MMC card/U disk , FM function, LED display, ...