best home security camera system outdoor wireless

It typically is a touch pad system installed near the front door. Motion sensors are installed in areas where people usually pass, such as hallways. They send out an invisible field of around 25 feet in a 90 degree configuration, that detects movement. Door and window sensors consist of two parts that join together where the door meets the door jamb, or the window meets the windowsill. Should the door or window be opened when the system is armed,...

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