Brand New, Never Opened Temperature Sensor: Put temperature sensors in different rooms and choose which room to prioritize when. Wireless: Place it on a wall or shelf. Then forget it's even there. Google Nest Compatibility: Communicates temperature to compatible Google Nest thermostats up to 50 feet away. Low Energy Bluetooth Connection: Up to 6 Google Nest Temperature Sensors supported per connected thermostat and up to 18 Nest Temperature Sensors supported per home.