Magnetic switches are an important device of anti-theft alarm systems. Magnetic switches will be installed around the door or window (such as embedded inside the jamb, etc.) to check and alert if a tamper occurs. The magnetic switch consists of 1. The switch (installed on the door / window frame) and 2. The magnet (mounted on the door) When the door or window or window is released, the switch is separated from Magnet Which will cause the anti-theft alarm system to work immediately.