Klein Tools ET310 AC Circuit Breaker Finder, Electric Tester and Voltage Tester with Integrated GFCI Outlet Tester

This has been one of the best tools I have ever bought. We bought an older home and I have been fixing or replacing receptacles and lights. It has worked on every item I had to fix. Highly recommended.

I debated on getting just the plug detector, but i figured I'd spend some money and get the kit with breaker detector & accessories (no pouch/bag). I've used this for checking a main panel swap and it paid for itself in finding a single outlet that was wired wrong and causing a network switch to not operate: after restoring power, there was no wired internet due to the network switch getting bad voltage. I can't even imagine having to find that problem with just my volt meter. 100% worth the electrician-skill-game enhancer.The breaker detector was easy enough to use and helps I.D. circuits where labels have faded or just don't exist. It got the correct breaker, but there was a 'maybe' with the neighboring breaker, YET it made figuring out which breaker was for the dishwasher for a replacement job easy. Before using this, it would require some investigating, tracing wires where applicable, deducing which voltage breakers (220/110), and even then we would have to take guesses sometimes and just start tripping breakers till we found the right one (or short the end of the wires together to force a trip, I know REAL safe...). Now, worst case, is you have 2 breakers that need tripped for the 1 circuit you're working on. I'm not sure how it would work if the circuit is wired wrong, i.e. if neutral and hot are reversed, etc, but the instructions say that the circuit must be wired right in the first place for the detector to work...Works for electricians of course, but as an HVAC/Plumber tech, I find it highly valuable. I think DIY'ers and homeowners could benefit for the "pricey" gear and kit from a know name brand.

The circuit breaker finder works perfectly—accurate and easy to use. It quickly identifies breakers, saving time and effort. A must-have tool for any electrical troubleshooting.

I ordered this tester because it seemed like something that I should have in my "tool arsenal". I tried it as soon as I got it so that I knew that it worked and so that I would know how to use it when I needed it.Circuit Breaker Finder - Worked like a charm! I plugged the "sending unit" into an outlet and then headed for the breaker panel. Using the tester I followed the directions and slowly passed it over all of the breakers once and then repeated it. As you get close to the right breaker - it will start to chirp a bit and when you are on it, you get the tone and the red light and the flashing green - can't miss it! I then flipped that breaker and went back to the outlet I was testing and it was the correct breaker.Sending Unit/Outlet Tester - This is handy in that it shows you if the outlet is wired property (and it was) and I like the GFCI tester function. I tested several of the outlets in my kitchen that should be on a GFCI circuit and when tested, did trip the GFCI outlet that was controlling them.Everything works, it was easy to use, and it makes testing and working on your home/farm wiring really easy. 5 Stars and I would buy it again for sure.

so easy to use.. lasts a long time... can really help track down a circuit in a house or other building.