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It did "beep" in a couple of places as I swept it around my microwave oven door as I was heating a cup of water. It comes with 2 buttons, A and B, but do not ask me how to use them. The instructions are written in frankenstein english that was thrown into a blender then ironed on an ironing board..so YOU get to TRY to figure it out what they mean. Good luck.
Verified purchase: Yes | Condition: New
More of a novality than a precise instrument for detecting R/F. It does detect as I have checked the item via various electronics that produce A signal. I can not attest to it's frequency range as I do not have the proper equipment. All in all, remember, you get (in most instances) what you pay for.
Verified purchase: Yes | Condition: New
it doesn't work. doesn't do anything as a matter of fact except turn on and off. it doesn't pick up any signals. its a waste of money
Verified purchase: Yes | Condition: New
Kind of worthless; does nothing.
Verified purchase: Yes | Condition: New
Not easy to use and doesn’t work.
Verified purchase: Yes | Condition: New