Wuloo solar roadside alarm works great. The original four sensor unit worked so well that I bought a second one to get four extra sensors. I now have 8 sensors paired to both receivers. One receiver is below, the second can be taken to the garage or other rooms in the house. One of the sensors didn't pair as a ch5 sensor but worked fine as a ch7. My guess is that the DIP switch in that sensor may have had a problem. The only missing feature I would like is some kind of contact closure output so I can connect it to another device. In addition to my 24/7 video surveillance system, I use sensors. Motion detection in a video system is very prone to false alarms. IR sensors are much less prone to false alarms. We usually have bears in the area and would like to be notified when they approach our home. You must be careful when aiming them as moving leaves and sun reflections can cause false alarms. Viewing the area you're sending them to with a thermal imager can help you quickly spot problems and make adjustments. Well, if they survive?
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