Step 1: Pair sensor to Gateway before positioning on the door/window
Step 2: Apply adhesive 3M tabs to the back of each part of the sensor (1 or 2 tabs is adequate)
Step 3: Depending on the shape and design of the door/window, place one part on the door/window frame and another on the outer door/window frame.
The two parts have a magnet within, this meaning when part 1 and part 2 separated it then sends a notification to your phone. Part 1 and part 2 need to be situated next to one and another and in a position that they can break apart from each other once the door/window has been opened.