This wireless Pet friendly PIR sensor from Yale gives you peace of mind and security at night. It's ideal for activating the alarm when larger motion (25 kg and above) is detected, ideal for helping to increase security around your home. Activates the alarm when movement is detected Ideal for homes with one small pet less than 20- -Pack of 3, Weight: 1.1 pounds, Manufacturer: Yale. This sensor is suitable for use with any Easy Fit Alarm Kit and comes with a 2-year guarantee. It is ideally placed in the corner of any room. When the alarm is set, the sensor will detect motion.