Onebigoutlet 100"inch 16:9 Manual Projection Screen Projector Matte White Home Movie Theater Dual wall or ceiling installation design mount; Black background screen material eliminates light penetration Screen surface could wipe with mild soap or water; Matte white viewing surface diffuses projected light uniformly Diagonal 100 offers 87"49-inch viewing area; 16:9 HD screen format Ideal for home theater, public display, business, classroom etc; Matte white viewing surface diffuses projected light uniformly Shelf-lock system allows you to adjust the height and aspect ratio