The Yale Pet PIR Motion Detector is wireless & easy to pair with your Yale Smart Home Alarm System, allowing you to extend you system to tailor it to your individual needs. This Pet friendly accessory will activate the alarm when larger motion (25kg & above) is detected. Ideal for homes with one small pet (less than 25kg). Please note that when used with larger pets there is an increased possibility of false alarms. In these scenarios use a Door/ Window Contact to protect the area instead.