Title: Random detections; receiver died after about a month
Review: This alarm had problems from the start. I tried different positions/angles and it would work reliably for a few days and just stop. The outside part always worked because I saw the red light come on everytime I drove or walked past it, but the inside part stopped responding, I know this because I kept the receiver in my upstairs window (because it only seemed to work when it had a direct line of sight) and the receiver would light up when it worked. I had this for roughly a month when the receiver completely died. A side note; this is very cheaply made. The plastic battery cover on the back of the outdoor part snapped off easily when I changed the batteries; I had to use duct tape to keep them in. It is a small investment so take the risk if you want. I would not buy this again.
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