Key Features . DIY friendly - wireless and easy to pair to your yale sync alarm system.Connected - compatible with yale sync alarm and yale intruder alarmConvenience - mount to any door or window throughout the homeSecurity - secure main access points and trigger the alarm when door/ window is opened The Yale Door and; Window Contact is wireless and easy to pair with your Yale Intruder Alarm System allowing you to extend your system to tailor it to your individual needs. This accessory will activate the alarm when the door or window that its connected to is opened giving extra peace of mind. What\'s in the Box . 1x Door/ Window ContactFixing Pack. .