You are bidding on one new open box HP UHD USB Graphics adapter, p/n N2U81AA.
This plugs into a USB 3.0 port and provides you with a DisplayPort that you can plug high resolution displays into. This supports up to 2560 x 1600 at 60 Hz, 3840x2160 at 30 Hz, and is compatible with Windows 7, 8.1, and 10.