The Johnson Controls WRZ-TTJ0000-2 is a wireless room temperature sensor with an easy-to-read display, designed for monitoring and controlling indoor comfort. It measures room temperature and wirelessly communicates the data to compatible Johnson Controls HVAC controllers through a WRZ receiver. The sensor is used with compatible Variable Air Volume (VAV) equipment and Field Equipment... https://www.partshnc.com/wrz-ttj0000-2-johnson-controls-temperature-wireless-sensor-w-display