[CPLX]

I had a similar thought, so I bought this:

https://onairwarning.com/pages/products

It completely sucks and doesn't really work. So don't make my mistake.

[Liftyee]

I don't know why they decided to put the "warning!" text box on the actual thing - it would look much cleaner if it just said "ON AIR" . Inane copyright/trademark reasons?