Wireless flexibility allows door/window protection even where the sensor must be totally concealed. The sensor is placed in the door frame and the magnet is located in the door.
Just add a sensor to any door or window in those hard to reach areas that need protecting. There is no wiring required, so these reliable sensors are on guard in just minutes. They can be placed on gun cabinets, medicine cabinets, swimming pool gates, or any restricted areas of the home or business.