Logitech Astro MixAmp Pro TR 7.1ch External Interface External Interface: USB Surround Sound: 7.1ch I have only confirmed that the device powers on when connected to a USB cable. Detailed operation has not been confirmed. Please purchase with the understanding that the device's full functionality is untested. Please understand that there may be undiscovered defects. The items in the photos are all that are included. Please understand that this is a used item before purchasing. We will use recycled materials and ship with simple packaging. Immediate purchase is welcome, and price reductions are not possible.