USB External 7.1 Sound Card Converter Desktop PC independently connects a 3.5 earphone converter. Product parameters: * Compatible with regular speakers or earphones with microphone hole. * USB interface, plug and play right out to replace traditional sound cards. * Multi-channel technology provides 7.1 channel dynamic sound effect *Dynamic rotating sound field; *Switch between earphone and speaker mode freely. * Freely adjust the position of the analog speaker * Mixer function; * Output level adjustment; * 16 rhythm preset mode; * 23 different sound field setting modes; * Convert analog signals (line signals such as microphone and CD, MP3, TV, Boomcasse) to digital signals Black case uses simple USB port devices, i.e. plug-in. Features: 1: All wires are replaced with the latest stable LE 3 circuit. No noise, 3D sound effect, support mixed effect. No drivers are required to support all current systems. No noise from the original system. Ideal for listening to music and watching movies. System support: Windows 7/8/10/Mac OS X