In WIN2000, WINXP, WIN3003 system, there is no need to install driver, easy operation just plug in earphone or speaker, wonderful music can be enjoyed immediately!!! Compact size, easy to carry. Compatible with pure USB2.0 digital sound output, virtually 7.1 channel processing capability Baby details: A compact LED light; Support common speakers or headphones, with microphone hole; USB port, plug and play, instead of traditional sound card; Microphone recording function; Karaoke function; Multi-channel technology for dynamic 7.1-channel sound effect; Dynamic rotation sound field; Free switch function between headphone and speaker mode; Analog speaker position free adjustment function; The mixer function; Adjusting the output level; 16 rhythm preset modes; 23 sound field preset modes; Conversion of analog signals (microphones and line signals from CD, MP3, TV, recorder, etc.) to digital signals and backup functions Exterior looks like a flash disk, housing black, simple USB interface device, plug and play.