Diffuse reflection eye protection: The projection screen uses diffuse light source technology, which can provide uniform, stable and colorful light, which not only improves the quality and appearance of the projection picture, but also protects your eyesight to a certain extent | Ultra-wide viewing angles: The projection screen has a wide viewing angle of 178°, which ensures that the audience in every seat gets a clear picture in the home theater or business meeting, enhancing the overall viewing experience | Convenient and space-saving: Manually pull down the movie screen, lightweight, easy to store and carry, can be installed on the wall or ceiling, rolled up when not in use, or placed in the corner, saving time and space | Different Format Sizes: Cinema screens come in 4:3/16:9 screen formats and 40/50/60 inch sizes, supporting 4K and Full HD images for great visual enjoyment | Suitable for a variety of scenes: The roll-up projection screen is easy to carry and suitable for indoor and outdoor use, whether it is a home theater, office meeting, school activities, etc