This is a screen cover for the ender 3/Pro. I recently got a Beaglecam and the glare from the screen looked a bit rough on the night vison time lapses. This cover is designed to snap into place to cover the screen. It is loose enough to slide up to still view most of the screen while being secure enough to not come off unless you try taking it off.
Some tips:
To install:
The author marked this model as their own original creation.