Negative Positive
Title: Returned this to Amazon
Review: I may have received a defective item but I didn't want to waste my time trying another. Studs were apparantly 4" in width and it wouldn't detect AC unless placed on top of an outlet or switch. I even checked it on a wall with an open back to verify it didn't work properly. I sent it back and purchased a Zircon Pro SL-AC from a local merchant and it works just fine.
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