SIIG Full HD 24-Bit/192 KHz Multimedia HD Digital 7.1-Channel USB Audio Box CE-S70011-S1 Compatible with Latest USB Audio Device Class 2.0/1.0 (UAC 2.0) Full HD (24bit/192KHz) multimedia 7.1-channel USB audio box Embedded independent audio processor Full HD audio output with 108dB SNR Front RCA stereo outputs Standalone Line-in, Mic-in and Head Phone-out Optical input and output for PCM data Big wheel for volume control and push to mute