Two Way Security Door Guards make up the backbone of any security system. Ideally, the sensors get placed on every door and window in the home, though some people only use them on the lower level of the house to save money. If a door or window gets opened or breached when the alarm is on, the sensor sends a signal to the main control panel, triggering an alarm.
- Allows you to get air through your screen door without the door alarm sounding.
- Includes two sensors, two wire leads, and four screws.
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