The Dual Curtain Outdoor Jeweller is a motion detector for covering the perimeter of a site with exceptional accuracy and a near-zero chance of false alarms. Featuring a unique optical system, the device looks over narrow sectors of up to 12m long (39 ft). Dual motion detection technology engaging two PIR sensors and one Ka-band microwave sensor allows filtering out false alarms caused by thermal noise, animals, or plants. The detection range and pet immunity mode are configured via a slider on the detector’s enclosure, and sensitivity is configured in Ajax apps to meet the specific needs of the site. Pre-installed batteries ensure stable performance for up to three years.