Elite M150XWH2 Projection 150" White Cased Screen. Simple to mount, easy to use pull down projection screens from home theater. Dual Wall and Ceiling Mount Design, Screen Aspect Ratio: 16:9 (HDTV) and 4:3 (Video) Formats for Wide Variety of Home Theater Uses, Advanced Auto-Lock Pull Down System and Easy to Clean and Durable for Daily Usage,