I really wanted to like this sensor. It was nice that it detects a door opening and turns on the light when you walk in, as opposed to an IR sensor that has to see the body before it turns off. However, there are a couple of interruption issues that forced me to bring them back. Difficult to set up and get stuck: The main problem is that they are buggy and cannot be set up properly. After two days of trying to set them up I can't help them get stuck. They are set to the lowest time setting (8 seconds) but they periodically freeze and I find the lights come on after a few hours. The only way to force them to reset is to turn the dials to the minimum setting and then set them again. I've tried so many setting adjustments and they seem to work when I'm in space and I can hear relays switching as I move through space. But then I come out of the detached garage and look out in a few minutes or hours and the light will still be on. Strong WiFi interference at 5 GHz. My detached garage has a Google Nest hotspot connected to the main house via WiFi. This point worked fine for a year and then I installed these sensors and the point went offline a few minutes after turning it on. If I can hold it long enough to test it, the signal level goes from "Excellent" to "Poor" when those sensors are activated. Nest WiFi and most other mesh WiFi systems use the 5 GHz band for mesh backhaul. It looks like this sensor is interfering with that spectrum. Installation issues, clearly not intended for the US market. As others have pointed out, it has some snap-button spring clips. They do not comply in any way with US electrical codes and there is no UL listing on the product. In addition, they are too small and very difficult to handle. You can barely stick 14AWG stranded wire in it (that's the minimum you can use in the US, and even then only for limited lighting setups). These connections look better on the thermostat of another low voltage component than on a line voltage device. Also, the mount won't fit a US standard 4 inch box, you need to make some kind of adapter plate.
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