Pro: Works VERY well. No, notta, not even one, zero...zero false alarms. Con: Mounting brackets are not adjustable and therefore not of any use. But still mountable onto a flat surface...such as a flat board or something. I'm through trying to use unreliable PIR detectors.
This is my second set for use on the other end of my property. I powered the set with solar panels and a car batteries. Then ran 1000' of cable to my house where it triggers a switch for an audible alarm. Finally a working system for intruders.