Diamond Multimedia USB 7.1 Surround Sound Audio Box/Cards XS71UV2 for Windows 10, 8.1, 8 and 7 USB 1.1 interface (USB 2.0 compatible) USB audio class specification version 1.0 Bus powered via USB 4 analogue outputs (3.5 mm stereo-jack plug) 2 microphone input (3.5 mm jack plug) 1 headphones jack (3.5 mm stereo-jack plug) Optical S/P-DIF digital input (TOS link)