
I bought a house with a significant number of switches on the control panel that were not clearly labeled and this tool worked great for figuring out which circuits were connected to my outlets! I followed the label instructions to double scan the panel before finding the switch (I just slowly moved the device down from the top of the breaker group and then back up) and after that it was really clear which one The switch on the transmitter was on. If you have a modern dimmer with a row of LEDs it will sometimes give false alarms because they are very loud. Turn off all LEDs with a dimmer beforehand if you find that a switch trips even though you have moved around the transmitter.

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