*Characteristic Build-in Sound Chip *USB: V2.0 *Power Powered by USB *Plug :1pcs USB connector and 2pcs 3.5mm audio jack Latest USB technology: Uses the latest USB circuitry to give a very low internal noise and a high signal-to-noise ratio; No auxiliary power or sound card required. Full-duplex capability: Full-duplex (microphone as well as speaker) USB adapter for the ultimate in both input and output performance. Plug-and-play convenience: Plugs right into your USB port Uses standard Windows drivers: Works with Windows 98SE, ME, 2000, XP, and Vista operating systems; No additional software required!