An ADT Motion Detector provides your home with a second layer of security. Anytime movement is sensed within a 25 foot radius of the Motion Detector, your ADT Home Security System will set off your alarm and the ADT Monitoring Center will notify you that your alarm has been set off and ask if you would like the police to be dispatched. Motion Detectors are the perfect compliment to ADT Door/Windows Sensors!

Great question! ADT Motion Detectors are pet immune up to 55lbs. Your cat will not set off your Motion Detector! (Unless he's Garfield)

ADT Motion Detectors are installed in the corner where two walls. They are typically places in high traffic area of the home are create traps zones. Examples of these include: Main Hallways, Downstairs facing the Staircase and the Primary Bedroom. Stay one step ahead of where burglars are headed with ADT Motion Detectors.

Great Question! With ADT's Stay Mode and Away Mode you have the ability to disarm your Motion Detectors while you are home while still having the rest of your ADT security armed and protecting you all night long. You will sleep wonderfully!