ecobee's Smart Thermostat Premium is brilliant at savings and comfort, allowing you to optimize your energy use through superior intelligence and technology. Included SmartSensor eliminates hot and cold spots and adjusts the temperature in the rooms that matter most. A built-in air quality monitor, smoke alarm detection, and geofencing technology to understand occupancy are just a few of the features that make saving energy just the beginning. Works with Siri, Alexa, Google Assistant, Apple HomeKit, SmartThings, and IFTT. (Apple home hub required to enable Siri).