Title: Totally unreliable
Review: Installed it in the evening, and it seemed to work fine. Next day was surprised to find that it had a very hard time detecting anything. Sometimes waving my hand directly in front of it would trigger it, but that was about it. I read some other comments about hot outdoor temperature being a factor, and it is summer time in southern California, so maybe that's it. Totally useless for me. Avoid.
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