The Nest Temperature Sensor (2nd gen) is easy to set up in the Google Home app. The battery lasts up to 3 years, 1 so you can put it on a wall, shelf, or wherever you want;You can put Nest Temperature Sensors in up to six rooms. Prioritize the temperature of one room, or set an average temperature across rooms like bedroom;Sleek and simple, the Nest Temperature Sensor (2nd gen) fits right in wherever you place it