Covers 360 degrees. Even dogs walking up the stairs will be detected if the sensor is in the basement. You can adjust the run time (output duration) by adding a capacitor. The information is hard to come by, but this is the best resource I've found. wolles-elektronikkiste.de/de/rcwl-0516-microwave-radar-motion detectorhttps://wolles-elektronikkiste.de/de/rcwl-0516-microwave-radar-motion detector
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