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This Black & Decker Home Protector Security System Glass Break Window Sensor is a reliable addition to any home surveillance system. It is compatible with any window and features a mechanical, self-adhesive design for easy installation. The DC power connector type ensures a hardwired power source, and the sensor is designed for indoor use only. The 9109B and 9110B models were manufactured in the United States in 1987, and they come without any manufacturer warranty. The sensor is analog in nature and is ideal for detecting glass breaks. It is perfect for those who want to add an extra layer of security to their home.