Nice Sound Quality 2.0 Non-magnetic Usb 2.0 Computer Pc Speaker With Usb Input Features: Accompanying spearker for PC, MP3, MP4, Pad, Smart Phone and Computer. In compliance with acoustics and aestetics rationale. Flexible sound with distinct tone levels. Built-in active amplifier makes the sound mellow and clear. Pure and elegent sound quality with unsurpassed effect. Small size makes it carry easily. Adjustable volume is more convenient to control tone.