This is an LG 27UL500 monitor. I purchased and used it about 5 years ago. As you can see in the images, there are scratches and stains on the screen and back. Brand: LG Screen Size: 27 inches Resolution: 4K UHD 2160p Aspect Ratio: 16:9 Screen Surface Description: Anti-glare Response Time: 5 ms Input Voltage: 100-240V HDR (Standard Brightness: 300cd/㎡) compatible 4K (3840×2160) IPS monitor Accessories: Stand, cables