With built-in Alexa voice service, ecobee4 can listen on your voice commands and respond. Have it set a timer, read you the inside track, adjust the temperature, and more. It also works well with other Alexa Devices by supporting ESP, in order that only the device closest to you responds on your commands. It also comes with a room sensor that helps manage hot or cold spots in your house, delivering comfort within the rooms that matter. And because they may be able to detect occupancy, they may be able to robotically enable the best mode for your ecobee4 for energy savings when it senses no person is home.