Wireless Remote Humidity Sensor, AC Power:18-30 VAC, Control Range:10%-75% RH, RH Accuracy:+/-3% RH, Measurement Range:10% -95% RH, Mounts Directly To Return Air Plenum, Controls Humidifier And Dehumidifier, Weight:5oz, Dims:2-3/8"H X 3-1/2"W X 2-1/8"D, In MFG Box, Made In China.**(Use With Bluelink Smart Connect Thermostats (NOT INCLUDED)**(Alt # BRA7330)