Protect residential installs, without the fear of false alarms caused by man's best friend. This sleek, yet modest PIR is designed to monitor for human-sized movement, while intelligently tolerating pets. The Indoor Motion Sensor alarms when motion is sensed or when the external contact is opened. It is battery powered and requires no installation tools. A Pyroflex sensor with HighBar signal processing allows for industryleading pet immunity and catch performance.