SPECIFICATION: The way connected with computer: 4P Normal USB plug Power Output: 1watts per channel Frequency response: 200Hz-20KHz Signal-to-Noise Ratio: 80dB Power supply: Computer's USB connection Dimensions: Length 50mm * Width 27mm*120mm Weight: 188g DESCRIPTION Even without driver installation., it is Can match with Win98/win200/winxp System. Digital amplifier technology provides More clear and more powerful sounds It's can be used as computer's sound Video and power amplifier speaker.