150 Inch Premium Materials: 4-layer composite structure craftsmanship fabrics fine picture quality clear screen performance not easy to fatigue after long-term viewing. Manual Self-Locking Position System: Manual screen innovative design self-locking torsion spring can accurately identify the subtle movements during opening and closing of the screen; reduce pullback rebound and inaccurate positioning. Anti-Crease : This roll up projector screen is absolutely wrinkle free and professionally rolled up with an outer package that is harder. Visual Feast: A panoramic viewing angle of up to 178 wide-screen view allows you and your family to enjoy a movie screen. The screen supports 3D 1080P 4K and Full HD images. Easy to Installation: The projection screen provided with two methods of installation: wall and ceiling mounting make it easy to set up in any home.