External USB Ultra-portable HIFI support WINXP,, WIN7win8.1 system does not need to install drivers; Just connect the headphones or speakers, the beautiful music can be enjoyed immediately!! Small size, easy to carry. USB pure digital audio output, virtual 7.1 channel proceing capability (actually 2.1 channels), the effect is similar to the motherboard integrated HD sound card, better than the AC97 integrated sound card effect, no noise, no current sound The microphone is very loud and is especially suitable for web chat. Support ordinary speakers or headphones with microphone holes; USB interface, plug and play, replacing traditional sound card; Multi-channel technology to achieve 7.1-channel dynamic sound effects; Dynamic rotating sound field; Earphone and speaker mode free switching function; Analog speaker position free adjustment function; Output level adjustment; Convert analog signals (line signals of microphones and CDs, MP3s, TVs, tape recorders, etc.) into digital signals and save functions. Simple USB interface device, plug and play