... Lin-ion 4.USB cable/remote control Features:This wireless laptop speakers can link to MP3, MP4, Notebook, CD, DVD, Mobile phone ... )Stereo sound design, excellent ultra-low sound4)High-efficiency digital Amplifier, enjoy pure and beautyful music 5)Music styles of Classic ... very good friend for tours & outdoor activities.7)LED display, with remote control,Support FM radio (optional) 8)Dual power supply ...