Product details:

Works in both zoned and non-zoned applications.Features Powered by RedLINK reliability No interference with other wireless devices in the home Works with compatible RedLINK enabled thermostats and accessories Installs in minutes Touchscreen interface with backlit display Can display outdoor temperature and humidity Built-in pager with an audible noise helps locate the device in the home Screen-lock feature helps prevent accidental changes 1 year battery life 2 month low battery warning In Non-Zoned Applications: Bring it with you anywhere in the home to sense and control temperature from the room that you are in In Zoned Applications: View and adjust all RedLINK enabled thermostats from a single control Controls up to 16 thermostats