I'd like to get a couple of circuit breaker finders for our shop. We often go into a building and don't know even what electrical room to start looking in let lone what panel. We work on single and 3 phase from 110V through 480.

I bought a plug in type several years ago and it was junk. Does anybldy make one that really works and on all sorts of voltages.

I'd like to keep the price under a couple of hundred dollars but if there's something out ther that performs spectacularly, I might be willing to go a lot higher.