Inkbird Pre-wired Plug Digital Humidity Controller AC 110V - 240V w/Sensor for Humidifier Dehumidifier Control humidity by setting value and differential value; Delay protection for Control output; Query current temperature; Switch the modes between humidification and dehumidification automatically;Calibrate the humidity value; Alarm when sensor error or humidity exceeds limit; Alarm when humidity exceeds high/low humidity setting value;