... loudspeaker, for stage, shop, disco and KTV 2) USB loudspeaker with USB, SD, remote, colorful lights USB 2.0 professional loudspeakerOutput(RMS): P ... mp4, mobile phone(4) High-efficience professional digital vedio amplifier.(5) USB, SD card, FM, remote control, LED display 2.0 ... ,auto scaning,FM function with frequency range 87.5-108MHZ6,Function: Support SD and MMC card/U disk , FM function, LED ...