The Thermostat Of The Future. The ecobee4 is a smart thermostat like no other. With built-in Alexa Voice Service, ecobee4 can listen to your voice commands and respond. With Alexa, the ecobee can not only adjust the temperature, but it can also set a timer, read you the news, play music, and more. The ecobee4 comes with a room sensor to help manage hot and cold spots. When you place sensors in your favorite rooms, ecobee4 can read the temperature and detect occupancy. And because they can detect occupancy, they can automatically enable the right mode on your ecobee4 for energy savings when it senses no one is home. Features: Room Sensors help manage hot and cold spots of your home, delivering comfort to rooms that matter most. Comes with Alexa Voice Service built in, so you can ask your ecobee to set a timer, read you the news, play music, adjust the temperature, and more. Far-field voice technology means your ecobee4 can hear you from across the room. Easily adjust temperature and comfort settings from your Android and i - OS devices. Save an average 23% on heating and cooling costs each year. Ensures you're comfortable by using thousands of data points to adjust your home to the right temperature. Get free monthly reports on how much energy you've saved and tips on how you can save even more. Hardwired for reliability means ecobee doesn't steal power from equipment to charge itself Fast, easy installation you can do yourself. Use our handy step-by-step guide right on your phone.