... to many kinds of audio devices, such as laptop , computer, mp3, mp4, mobile phone(4) High-efficience professional digital vedio amplifier ... treble control3. loudspeaker adapt to computer, laptop, DVD, VCD, CD, MP3, TV, mobile phone and other audio input Accessaries:stereo audio ... range 87.5-108MHZ6,Function: Support SD and MMC card/U disk , FM function, LED display,remote controlTrade Term:1.Payment ...