HP NL571AA - USB Graphics Adapter.

USB to DVI Graphics Multiview Adapter enables connection of up to six simultaneous displays to help you boost productivity and multi-task across several open applications. Create USB connections between displays with no restart or reboot required. Simply plug the display into the adapter turn on the display and begin working. Connect and disconnect the USB cable to maintain screen persistence or move content between displays. Daisy-chain multiple USB-capable displays with multiple adapters or use one adapter to bridge between a notebook or desktop PC and a separate USB-compatible monitor such as any HP advantage or performance series business monitor.