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

I replace my own fans, lights, and outlets. I don't do electrical work often, so when I do I often have to try 2-3 circuit breakers as the labeling is pretty bad. This lets me pinpoint the proper switch the first try. So no more fire alarms beeping or resetting clocks because I turned off the wrong breaker. Also, the piece that plugs into the wall lights up. When you shut off the correct breaker, the light goes off so you know for sure you got the right one. Still use a voltage detector to be 100% certain, but this gets you to where you feel "certain." I put that in quotes because one mistake with electricity means lights out for human beings.If those kinds of annoyances don't bother you, you don't need this. If they do or you just want an easier way to be sure you've got the correct breaker, this is a great tool set.

This was a great buy. Everyone who works on electric items definitely needs this. Very helpful

We bought this several months ago, but just got a chance to use it. Highly recommend, works amazing. Makes it easier to find and label the circuit breaker box. We also marked the back of the outlet covers to make it easier if we need to fix or replace in the future.

Works as expected, great you tube video out there

The Klein ET310 Circuit Breaker Finder is a great tool to help in locating the right circuit breaker. I plan to use around my home and help my friends to locate the right circuit breaker. I used it today, and it easy to use and found my breaker quickly. It is a time saver and it will help you get the job done. I like the light weight design and the transmitter doubles as a circuit tester to ensure that your wiring is correct. It is designed very well and light weight and has an intuitive instruction manual. This is a great device and I highly recommend it!

The Klein Tools ET310 Circuit Breaker Finder is a game-changer for anyone who works with electrical systems. It’s reliable, easy to use, and takes the guesswork out of identifying circuit breakers.Build Quality:This tool feels solid in hand, as you’d expect from Klein Tools. The rugged design is built to withstand the typical wear and tear of electrical work, and the buttons and connectors are responsive and well-placed.Ease of Use:Using the ET310 couldn’t be simpler. Plug the transmitter into an outlet, and the receiver does the hard work of identifying the corresponding breaker. The receiver is intuitive, with clear lights and sound indicators that make it easy to pinpoint the right circuit.Accuracy:The tool’s accuracy is impressive. It quickly and reliably identifies the correct breaker, saving time and eliminating frustration. I’ve tested it in both residential and commercial settings, and it’s been spot-on every time.Additional Features:The built-in voltage tester is a great bonus. It adds an extra layer of safety, allowing you to confirm whether an outlet or circuit is live before starting work. The integrated GFCI testing function is also handy for verifying ground fault circuits.Portability:The ET310 is compact and lightweight, making it easy to carry around in a tool bag or pocket. The included case keeps it organized and protected when not in use.Value for Money:For the price, the Klein Tools ET310 offers excellent value. It combines multiple essential functions into one device, saving both time and money on electrical projects.Final Thoughts:The Klein Tools ET310 Circuit Breaker Finder is a reliable, well-designed tool that’s perfect for electricians, DIYers, or anyone who regularly works with electrical systems. It’s accurate, easy to use, and built to last—exactly what you need in a tool like this.Highly recommended for its functionality and convenience. It’s one of those tools you’ll wonder how you ever managed without.

Takes the guess work out of your electrical panel. Simple to use, safely and effectively locates hot breakers. Well worth the money.

This tool paid for itself on its first use. Invaluable for finding the correct circuit breaker and the tester part found an open ground on the first outlet I plugged it in to. Typical Klein quality for tools.