I bought this to replace a 20 year old wired motion sensor for our security system from a reputable company. So far it works great and looks a lot better than the old yellowed one. I have a 12 volt system. Here's a tip: take a picture of your connected cable so you can use it as a reference once you remove the cover. Be careful with the resistor, it is most likely connected to one of the wires, in my case it was the blue wire, but it could be different. against my old one. Also this new one has 6 mix 4 verses on my old one.
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