This projection screen is ideal for classroom training, home theatre movies, public display, conference room presentations, etc. The screen is 1.3 gain, so an optimal picture quality is guaranteed. Its white mat viewing surface diffuses the projected light uniformly. This projection screen has a 4-sided black masking border which increases picture focus & contrast. In addition, its self-locking design allows the screen to be fixed at any position. Dust accumulation is highly prevented thanks to its smooth surface made from special light proof and mildew proof fabric, which is anti-static and anti-acid. The screen surface is easy to clean; simply wipe with water. Its durable and sturdy tripod makes it easy to transport and set up.