Display Board - static cling plastic boards

I’ve seen paper stick to what looks like 1/4" plastic sheets mounted to walls in design studio without tape, magnets, or pins, just pure static electricity. Does anyone know what type of plastic this is or any ideas if this is anything other than acrylic?

I thought this was a very clean and elegant solution to display work without clutter.

Thank you!

It’s battery powered, not just “static” cling.

Google is your friend, read this → Static Display Boards Video | Bound To Impress Sunshine West VIC 3020

And welcome to the boards Dan!