This Focus Wireless Magnetic contact is a two-part device used to safeguard your windows and doors.
Focus Door/Window Magnetic Detectors (Wireless)
One part of the contact is a switch installed on the window frame or door jam; the other contains a magnet and is placed on the window or door. If there is any detectable movement between the two parts a signal will be transmitted to the alarm panel (receiver) which will then activate the siren.
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