Here's the one I got, for reference: https://www.amazon.com/gp/product/B07F5L69GD/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1
I kind of wish I had more projects to use it for... should I just start tiling random walls? ;)
The big thing to look for is that it does 3 planes (rotary/vertical/horizontal) which means you can align it exactly with how your screen hangs from the ceiling and get a perfectly orthogonal line traced on the ceiling.