I bought this sensor to replace my old motion sensor which gave false positives on two of our cats. I put this sensor in the same place as the old one. Another cable connection was required, which took several minutes to unravel. The instructions that came with it weren't very helpful. +, - and a loop (2 wires) are required to trigger the alarm. My old sensor only needed +, - and a wire to trigger the alarm. Luckily for me, the original installer used a 4-wire cable, so I only had to connect the 4th wire to the sensor and the 4th wire to the alarm panel. It also required a resistance, which I already had. But I'm not sure if that applies to my anxiety. We've been using it for about 3 weeks, no false positives yet! When we receive I will update this review.
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