Pack of two ecobee Smart Sensors that work with ecobee Smart Thermostats Detects room occupancy and communicates the information to your smart thermostat from up to 60ft., even through walls and floors Prompts your thermostat to make automatic temperature adjustments for optimal comfort Place the SmartSensor in your bedroom to eliminate uncomfortable temperature fluctuations throughout the night View temperature differences and occupancy in specific areas of your home and make adjustments directly from the ecobee app for personalized comfort Detects unexpected motion with an ecobee Smart Security subscription that provides real-time alerts on the ecobee app, keeping you informed about activity at home even when you're away Install effortlessly by magnetically and wirelessly placing it at least 5ft. above the floor on its satin-steel stand or on any wall using the self-adhesive wall mounting brackets