New EcoBee Smart Sensor (Pack of 2) Compatible with SmartThermostat Pro with Voice Control, EcoBee4 Pro, EcoBee 3 Lite Pro, and EcoBee3 Pro - Yorktech Supply
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ecobee SmartSensor 2-Pack White EB-RSHM2PK-01 - Best Buy
ecobee SmartSensor (2-Pack) EB-RSHM2PK-01 - The Home Depot
Motion sensor for doors and windows | ecobee
Amazon.com: ecobee New Smart Thermostat Premium with Smart Sensor and Air Quality Monitor - Programmable Wifi Thermostat - Works with Siri, Alexa, Google Assistant
Ecobee Smart Thermostat Premium + 1 Remote Sensor + Installation – Nextech Energy Systems
ecobee EB-STATE6P-01 Premium Smart Thermostat for Pro with SmartSensor