Had to buy more ( 6 ) sensors to protect the windows. The ( 4 ) sensors that came with the Ring Alarm system were used to protect the doors. Easy to install , compact and they will work when offset from each other or turned sideways. Had to be creative for two of the doors..... kitchen door to garage and the sliding glass door. ( see enclosed pics ) So far everything has been working great and no false alarms.

We started with the security system and added these door sensors to our system at home. They were simple to install and add to our Ring App security system. We have every door protected and they have worked great since day 1. If you are looking for a great way to protect your home and install it yourself I highly recommend these comtact sensors.

THESE CONTACT SENSORS LET ME SLEEP GOOD AT NIGHT- THEY ARE LIKE HAVING A SECURITY GUARD WHEREVER U PLACE THEM - EASY TO INSTALL & QUALITY MANUFACTURING WHAT ARE U WAITING FOR.

Great motion detector for a room,if someone breaks a window to get in,the motion detector will pick up the movement! Kinda pricey but does the job….

Works great! I have several door sensors. They all work great!