This projection screen is ideal for classrooms, training, home theaters, public places, meeting rooms, etc. It is designed to be mounted on both ceiling and wall and its light weight makes installation even easier. The screen has a gain factor of 1.3 which makes the projected image quality excellent. The matt white viewing surface distributes the projected light evenly. The smooth surface is made of special mildew-resistant fabric, which is also antistatic and acid-resistant. This prevents dust from sticking to the canvas. Other dirt can be easily cleaned with a (wet) cloth and water. The 4-sided black masking edges promote image sharpness and contrast. 1