Review on Easily Locate AC Circuit Breakers & Test GFCI Outlets with Klein Tools ET310 by Dave Calabro

It's pretty easy to use. You plug the transmitter into an outlet and then use a stick to find the appropriate circuit. When you have tandem circuit breakers, it's a bit more difficult to determine which switch is the correct one. This helps to make contact with the probe tip and make several slow passes. You can also tell what other jacks are on the same circuit as the jack you plugged the transmitter into, but this is less reliable but useful. works as intended and accuracy is high enough to get the job done. Five stars. I keep buying Klein tools and have never been disappointed by the quality, functionality or price. This set is of high quality like everything else I've bought from Klein. I recommend purchasing the Breaker Accessory Kit (69411). It comes with a few extras including a socket adapter (E26 socket) and an alligator clip adapter for bare wires.