Boost the performance of your smart thermostat with the ecobee SmartSensor. This sensor detects room occupancy using infrared technology and wirelessly relays this information to your smart thermostat within a 60ft. range. The thermostat automatically adjusts the temperature for enhanced comfort. This sensor saves you energy by preventing unwanted heating or cooling of rooms. | ecobee Smart Sensor for Smart Thermostats - 2 Pack - White