Reviewed on 12/03/2016
I love the low profile of using a door hinge for a security sensor. As other reviews mention... do not waste your time with the set screws included, get the longer screws mentioned in the instructons. Product was very easy to pair and install!
Works great but may need some extra screws
Reviewed on 10/29/2016
I've had these on several doors for three or so months now with no issues and very reliable. They were easy to pair and install. The door screws that came with them were shorter then the ones already in the door so I just reused the ones I took out of the door. No big deal. The screws they need to replace, from all three install perspectives of mine, are the little set screws for the contact switch. These aren't magnetic like the other contact sensors. These have small micro switches on one side of the hinge that the other side trips when the door closes. Depending on your door they may not contact so they include a small set screw for adjustment. The set screw is short so when adjusted correctly may not be very secure. I never had it fall out for the first few days of use but could see it falling out and the switch not working over time. They mention this in the installation instructions and mention the option of using a short pan head 4-40 screw instead. I happened to have some and they work great and are very secure. I'm giving this four stars cause I think they should have just included(or replaced the other screw) the 4-40 screw in the first place. Other then that small issue these have been rock solid. They are perfect when you have doors with decorative trim that makes it hard to stick on the other magnetic contact sensors.