Dehumidifier Control, Control Range 40 Percent to 80 Percent, Humidity Differential +/-5 Percent, Mounting Location Wall Mount Allows you to adjust the humidity setting or turn the dehumidifier On or Off. Can be used as an external control where the control unit is mounted in the same space as the dehumidifier, or as a remote control where the control unit is located away from a difficult-to-access dehumidifier.