This is a damaged screen, and that can be seen in the images below.
There is a small crease in the screen where it was folded incorrectly after installation. It's difficult to see from the photos below, as the crease is minor, and on the bottom of the screen.
The Ambertec WM-RM92 screen features "Separated Casing" patented technology that reduces noise and vibration. This helps to eliminate the common noise problem caused by the friction between the screen casing and ceiling. This exclusive technology ensures that although the screen is completely hidden to provide a seamless finish, there is no compromise in quality.
This screen is designed to be recessed into the ceiling and is an ideal hidden solution for installations such as home cinema, office and conference rooms.
By utilizing an aluminum alloy casing, it provides the screen with a more solid and rigid structure while at the same time reducing overall weight. The modern and attractive design of the recessed ceiling screen blends cleanly with any interior decoration and installation scheme.
The screen does have some damage to them, in the form of a small crease (~6cm) on the bottom of the screen, to the center left. The post-it on the below image shows where the crease shows.
Check out the brochure: Recessed Series