Comes with a remote room sensor in the box so you can monitor two areas of your home from day one. The best pick for larger homes where one thermostat can't tell the whole story.
If you've ever had a room that's always too hot or too cold, the T9 solves that problem out of the box — no extra purchases required. It's the most practical choice for multi-room households.
“The company's high-end Home T9 Smart Thermostat is packed with features, including a remote room sensor included in the box, allowing you to monitor two areas of your house simultaneously without purchasing additional sensors.”