It's a Quad Cortex what else has to be said, It has the latest firmware rev. You'll get the barefoot buttons and the KNK screen saver. That right there is $145. Reason for selling? I'm going back to a traditional amp. the Quad sells new for $1,800 but you get the KNK screen saver, the 4 Barefoot Buttons, the original box the unit came in with all of the stuff shipped in the box from Neural, all for the low low price of $1,499.00 plus free shipping with insurance. I will release the license from Neural and reset the unit back to factory settings.