Sometimes it works well, but not very often. It goes well for a few days, then it stops completely and after a few days it starts again. I've been trying to figure out the parameters to see what the problem is, but it definitely doesn't reach more than 50 meters. I don't think it's a detection issue, I think it's a range issue. I'll probably send it back and find something else that actually does what it says on the tin. Grrrr!
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