WELCOME TO ‘JUST RIGHT’. Works with Smart Room Sensors (sold separately) to focus on the rooms you choose by setting a schedule, or let the sensors focus on rooms people are in. Simple install for a DIY project. The T9 intuitively identifies your home’s heating and cooling type, guiding you through a simple setup, and making it easy to do it yourself. Control the T9 using the Honeywell Home app or through Amazon Alexa, Google Assistant, Microsoft Cortana, and more.