In WIN2000, WINXP, WIN3003 systems, you don't need to install drivers, simple to use. Just plug in your headphones or speakers, and wonderful music can be enjoyed immediately!!! Compact size, easy to carry. Compatible with pure USB2.0 digital audio output, virtual 7.1-channel processing capability. Baby Details: A compact LED light; Supports common speakers or headphones, with a microphone hole; USB port, plug and play, replacing the traditional sound card; Microphone recording function; Karaoke function; Multi-channel technology for dynamic 7.1-channel sound effects; Dynamic rotating sound field; Free switching function between headphone and speaker mode; Analog speaker position-free adjustment function; Mixer function; Output level adjustment; 16 preset rhythm modes; 23 preset sound field modes; Conversion of analog signals (microphones and line signals from CD, MP3, TV, recorder, etc.) to digital signals and backup functions. The exterior looks like a flash drive, black casing, simple USB interface device, plug and play.