Senses outdoor temperature and humidity to display on RedLINK™ enabled thermostats and accessories.
Features: Powered by RedLINK™ reliability. No interference with other wireless devices in the home. Reliable performance in all climates. Installs in minutes. Up to 5 year battery life. 2 month low battery warning Battery warning displayed on RedLINK™ enabled thermostats. Includes 2 AA Lithium batteries and mounting hardware