USB audio adapter - easily add sound to any notebook or desktop computer Virtual 7.1 channel surround sound provides home-theater quality surround sound via headphones or stereo speakers Built-in amplifier for rich and powerful sound Reduces unwanted static and noises from D/A processing Places speakers to preferred positions without moving actual speakers via Speaker Shifter utility Xear software offers 27 environment effects and 3 environment sizes, plus a 10-band preset equalizer Plug & Play compatible No power adapter needed, obtains power from the USB port Chipset: C-Media CM102 RoHS compliant Supports EAX 2.0, A3D 1.0, and Micr