It comes with two Dell 3007FWH-HC monitors. These are older but very high quality monitors with 2560x1600 resolution 1000:1 contrast ratio and IPS panel for very high color gamut (and fidelity).
For the right price I'll throw in a Logitech keyboard and mouse.
I have a minimum version Windows 10 installed on it right now so that I could check that all is working but assume that you'll need to install your own OS.