This 8-Channel 3D USB 2.0 External 7.1 Surround Sound Box with Digital Output offers an array of features for the best surround sound experience! It supports 48/44.1 KHz sampling rate for both playback and recording, SCMS compliant (Serial Copy Management System), supports USB remote wake up and stereo MIC support. This External Sound Box comes with a variety of connectors for easy hook up! Features : 8 channel 3D external sound pocket; USB specification 2.0 compliant; USB audio device class spec. 1.0 and USB HID class spec. 1.1 compliant; 8 channel DAC output with 16-bit resolution; 2 channel ADC input with 16-bit resolution; SCMS compliant (Serial Copy Management System); Supports 48/44.1 KHz sampling rate for both playback and recording; Dolby digital audio streaming via SPDIF out; Supports USB remote wake up; Stereo MIC support with boost capability; Additional headphone output with selectable source and phone jack sense; MCU supports with two wire serial interface; Master volume control by default; per channel volume control by C-Media driver; Vista support.