That's a great price, especially with a coupon. I first saw a tone generator similar to that several years ago, watching a technician trace a circuit back to the breaker panel. The service entrance was in a remote basement room, too far away to see a light bulb or hear a radio or a helper. Very nice for that!
Only shortcoming I see is that it won't help when you're trying to find the breaker for some remote ceiling lighting, and you can't first locate a wall receptacle on the same circuit that you can plug the generator module into. I had to do that last week. Can't very well plug into a wall switch. :laughing: Still need a helper and a cell phone or walkie talkie.