High-performance projector with 4K Ultra HD resolution and a 20,000:1 contrast ratio. - Model Name: HORIZON 20 Pro - Resolution: 4K Ultra HD - Sound System: harman/kardon - Contrast Ratio: 20,000:1 - Color Gamut: 110% BT.2020 - Brightness: 4100 ISO lumens Used indoors for about 60 hours. It projects very beautiful images, and what was especially good was the ease of setup and image adjustment, which was much easier and more convenient than other models. There is little sign of use, but it is a used item, so please refrain from complaints after purchase. There are some scratches on the remote control. There are also scratches and tears on the outer box. I have included images of the actual projection, but the colors are more natural and even more beautiful when viewed with the naked eye.