The Lyric thermostat is ideal for customers who are on the go and want optimal comfort and savings they don't have to think about. Instead of operating on a fixed schedule, Lyric uses their smartphone location and can automatically adjust the temperature as they come and go – delivering comfort when they're home and savings when they're away. The New Lyric™ Thermostat App based install – Everything happens in four easy steps using the mobile app – no manual necessary Geofencing uses a homeowner's smartphone location to automatically save energy when they're away and ensure comfort when they return home The Smart Cues™ feature delivers messages to a homeowner's device with alerts to change filters or with extreme temperature notifications The Fine Tune™ feature considers both humidity and temperature so that a homeowner's desired temperature always feels the same Shortcuts are buttons on the app interface that can customize quick temperature setting changes for specific purposes, allowing homeowners to change settings with one touch Does not work with electric baseboard heat (110 V or higher) Compatible with most other heating, cooling and heat pump systems Optional 24 VAC power ("C" wire) 5 Year Warranty