Amazon.com: ecobee New Smart Thermostat Premium with Smart Sensor and Air Quality Monitor - Programmable Wifi Thermostat - Works with Siri, Alexa, Google Assistant
Ecobee3 remote sensors now work as HomeKit motion detectors & room temperature monitors - 9to5Mac
How to Install Ecobee 4 (with Sensor & Alexa) - YouTube
Room Sensors: FAQs, Setup Guide, and Troubleshooting
How To Set Up Ecobee SmartSensor For Doors and Windows (Ecobee Contact Sensor) - YouTube