18 The monitor is new in its box, and God is my witness, it is amazing. 24 inches, 180Hz, and the rest is in the picture. I don't understand it. The sale is for the highest bidder. Hurry up. Its new price is 700, but I opened its box, and it doesn't have any issues. Screen Size: 18 inches Operating System: Linux RAM Size: 64 GB Brand: Asus Graphics Card: Integrated Storage Type: HDD