Title: Be prepared for many many false alarms!
Review: I purchased 3 of these (like an idiot). Of all the products I purchased from Amazon, I regret this purchase. I placed them on my porch, patio, and mailbox. FYI, the one in the mailbox didn't work as the signal wasn't strong enough to signal the receiver. I have followed the instructions including the "tape trick" and still get false chimes. Even placing the sensor in an area that has no movement including wind interference and still receive bogus chimes. I moved them several times with the same result. It seems that even sunlight reflection in the afternoon causes them to activate? These are very unreliable. They do not have a control to adjust the sensitivity like a motion floodlight, etc. After hearing the chime so often I became desensitized. I got so aggravated I stopped using them and plan to return! Ok, time to write more (positive) reviews ;)
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