It has sound quality comparable to CD, and is installed outside the case to prevent electromagnetic interference inside the case, making the sound quality more pure. Supports 2-channel analog 7.1-channel; High power: It can drive all kinds of high-impedance headphones, ordinary headphones and speakers. The sound quality is great, and the measured signal-to-noise ratio can reach 90 decibels. In WIN2000, WINXP, WIN7 8.WIN3003 system, there is no need to install drivers, the operation is simple, as long as you connect headphones or speakers, you can enjoy the wonderful music immediately!! Small size, easy to carry. Compatible with USB2.0 pure digital audio output, virtual 7.1 channel processing capability product detail: A compact LED light; Support ordinary speakers or headphones, with a microphone hole; USB interface, plug and play, replace the traditional sound card; Microphone recording function; Multi-channel technology to achieve 7.1-channel dynamic sound effects; Dynamic rotating sound field; Free switching between headphone and speaker modes; Simulated speaker position free adjustment function; Output level adjustment; 16 rhythm preset modes; 23 preset modes of sound field; Convert analog signal (microphone and line signal of CD, MP3, TV, tape recorder, etc.) into digital signal and save function The appearance resembles a flash drive, with a black shell, a simple USB interface device, and plug and play. Item NO.10023849