This Precision control is used to turn on or off a  humidifying or dehumidifying device like portable Fans or  Humidifiers in a range from  (30% - 100%) of relative humidity. No wiring is necessary. Simply plug the device you want to control into the plug on the humidistat, and select the percentage of humidity you want to maintain. Comes with 6' power cord. 

Direct plug in: Fans, Humidifiers, Misting systems, Heaters
Operates on 110/120 voltage up to 15 amps. 1/2Hp

Storage Temperature: -40 to 120 F.
Operating Temperature: 40 to 110 F.

Selector:  Humidifier or Dehumidifier Mode

Adjustable range 30 to 100% RH   Accuracy 3%