1. Two ratios, 16:9 rectangular ratio, suitable for home theater, KTV, entertainment, etc.; 4:3 partial square ratio, suitable for conferences, PPT playback, education and training, etc. 2. Support 4K high-definition picture quality, the picture is delicate and the color is gorgeous 3. Simple and portable, foldable, easy to store and carry 4. The crease can be flattened with an iron, and the dust can be wiped off with a wet towel for easy cleaning 5. The perforated version with black edge has hooks, which can be installed by ropes, hooks, nails, tapes, etc., and the non-hole version has sticky strips for easy installation 6. The dark side is the viewing side, and the light side is the back 7. Ratio: 16:9/4:3 8. Material: polyester with metal coating on the surface 9. Specifications: 60/72/84/92/100/110/120/130/133 inch