It has CD-comparable sound quality and is installed outside the chassis to prevent electromagnetic interference inside the chassis, making the sound quality purer. 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 excellent, and the measured signal-to-noise ratio can reach 90 decibels. In WIN2000, WINXP, WIN7 8.WIN3003 systems, you don't need to install drivers, the operation is simple, as long as you connect headphones or speakers, you can enjoy the wonderful music directly!! Small size, easy to carry. Compatible with USB2.0 pure digital audio output, virtual 7.1-channel processing capability. Product Detail: A compact LED lamp; Supports ordinary speakers or headphones, with a microphone hole; USB interface, plug and play, replaces 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 sound field preset modes; Converts analog signal (microphone and line signal from CD, MP3, TV, tape recorder, etc.) to digital signal and saves function. The appearance is similar to a flash drive, with a black shell, a simple USB interface device, and plug and play.