Ring 2-Pack Contact Sensors

Add more security to your Ring home monitoring system! Pair of 2-part sensors detects the opening of a door or window. Each sensor has thick/thin components that align whenever door or window is closed. Alerts trigger when opening causes the components to pull apart. Ring subscription needed for alerts; Ring base station needed (within 250′) to detect sensors. Adhesive backing. Each uses two CR2032 batteries, included. 2″ l x 1.5″ w x .5″ thick.