Key Features . Wireless devices for easy set upIgnores small pets under 25kg200 Metre rangeSupplied with 9x AAA Batteries (3 per PIR)868 Mhz frequency helps prevent interference The Yale Sync Alarm Pet PIR Motion Detector is wireless and easy to pair with your Yale Sync Alarm System allowing you to extend your system to tailor it to your individual needs. The ideal security accessory for a home with a small pet. The Yale Sync Alarm Pet PIR Motion Detector has been specially designed to pick up movement over 25kg giving you peace of mind that your home is secure while minimising the opportunity for false alarms.This accessory will activate the alarm when motion is detected and will work up to 200m away from the control panel. What\'s in the Box . 3x Wireless Pet PIR Motion Detectors9x AAA Batteries. .