Upgrade your comfort with the Sensi Room Sensor, made exclusively for the Sensi Touch 2 Smart Thermostat (not included). With a slim design, easy connection, and no wires, you’ll have the flexibility to place your Sensi Room Sensor where you need it, using the stand (included) or on the wall. With a range of 100 feet, you can connect to 15 Sensi Room Sensors to your Sensi Touch 2 Smart Thermostat throughout your home, helping to reduce hot and cold spots by prioritizing and balancing temperatures. 2 AAA batteries required per sensor.