🔒 Secure Your Space, Elevate Your Peace of Mind! Designed for indoor use, operating between 32°F to 120°F. Smaller design for versatile placement options. Enjoy approximately 3 years of battery life with CR2032 batteries. Easily mount to frames without any tools. Receive instant mobile alerts when doors and windows open. Compact dimensions 250-ft Z-Wave range 3-year battery life The Ring Alarm Contact Sensor 2-pack (2nd Gen) offers a sleek, compact design that allows for easy installation on doors and windows, providing instant mobile alerts for enhanced home security. With a long-lasting battery life of approximately 3 years and a robust Z-Wave connectivity range, this sensor is the perfect addition to your Ring Alarm system.