Figure A Figure B Figure C Figure D Hard-wired home security systems can be expensive, and they often include monthly monitoring fees. As an alternative, you can easily install a wireless security system yourself. Program the module before affixing it to the wall. Drill pilot holes, and mount the bracket with screws. Remove the cover from the magnet, and screw it into position on the door so that it is next to the sensor.
Many sensors have an LED indicator to show whether the magnet is positioned properly.
When the magnet is in position, replace the cover. Install the window sensor to the wall in the same manner as the door sensor. Attach the wires to the appropriate terminals, tighten the screws, replace the cover, and attach the sensor to the mounting bracket. Install the motion detectors in an area that is likely to be entered. Make sure the motion detectors aren't near any objects that could interfere in radio transmission.