I got my monitor today, works well.
[IMAGE] My screen is Dell 27 Monitor-S2721HS, 68.6cm(27.0), Free-Sync, HDMI cable. I called three times and was hung up by customer service,  I just have poor ability to understand English and speak slowly. They hung up on me halfway. And now I still don't get my screen. Hope everyone has a nice day. Still waiting for the screen.
I bought a screen and haven't received the goods since I placed the order on 
December 20th