The Johnson Controls WRZ-TTS0000-2 Wireless Room Temperature Sensor is a battery-powered HVAC sensing device designed to monitor indoor temperatures and provide wireless data to compatible building automation and temperature control systems. It uses an internal thermistor to measure room temperature and transmits readings wirelessly to a compatible receiver, supporting effective heati... https://www.partshnc.com/wrz-tts0000-2-johnson-controls-wirless-room-temperature-sensor-55-85