Whether your home Alarm system is being monitored by ADT, Brinks or Protection One, the proper way of securing your home is by protecting both the perimeter (all doors & windows) with sensors, and the interior of your home with motion detectors. Our free ADT monitored alarm system includes 15 free Door/Window Sensors, for only a $99 installation fee; and it protects more of your home than Brinks or protection one, at a greater saving