Plug n' play, no software needed. Connects to PC via micro USB. Adjusts volume with the large silver dial. Connect both a headset and speakers and switch between the two at the push of a button. Excellent 7.1 surround sound mode for headsets. Quick buttons for EQ, sidetone, and reverb. Dial on the side for adjusting chat audio. Works with PC only, doesn't work on consoles. Comes with unit and micro USB cable. Asking 150 obo.