The Trane TZONE940AC52ZA Communicating Zone Sensor is a wall-mounted HVAC control device featuring a backlit LCD touchscreen for convenient temperature and humidity monitoring. It communicates with compatible ComfortLink II zoning systems through a three-wire connection, providing zone-specific temperature readings and allowing users to adjust heating, cooling, and fan settings. Desig... https://www.partshnc.com/tzone940ac52za-trane-sensor