Minimum distance from the wall
The parameter refers to wall mounts. Indicates the minimum allowable distance from the wall to the nearest protruding attachment point. It shows how close to the wall you can move the mount with the projector mounted on it.
Upward tilt angle
The maximum tilt angle of the platform on which the projector is installed is up from the vertical. If it is a ceiling mount, then this feature, usually, remains unclaimed, in contrast to the possibility of tilting down. But for wall mounting, it can be useful, depending on the location of the mount relative to the projection screen.
Downward tilt angle
The maximum tilt angle of the platform with the projector down relative to the vertical. So, if it is a ceiling bracket, then a large tilt angle will provide wider possibilities when choosing an installation location.
Turn angle
The maximum turn angle of the projector already mounted on the mount, relative to the horizontal line, to the right or left. As already mentioned above (see "Adjustments"), this allows you to level the unevenness of the ceiling on which the bracket is installed.
Rotation angle
The possibility of rotation of a projector relative to a vertical axis or a rod is provided. For the vast majority of mounts that have the ability to rotate an already installed projector, this figure is 360°, which allows you to rotate the projector around the rod and direct the light to the desired side of the room.
