Resideo C7189R1004 Sensor

Wireless Indoor Air Sensor, 0/120 Degree Operating Temperature, 5/90 Percent RH Non Condensing Humidity Range, Used to Sense Temperature and Humidty Remotely, Average Temperature and Humidity and Dehumidify in Separate Locations, Used with Prestige IAQ, Prestige 2.0 and VisionPRO with Redlink Thermostats