Product review (1 stars): Waste of time and money
Waste of time and money.
Both the original and replacement units
come uncalibrated which I didn't understand.
Now I know its because you "cannot" calibrate the humidity
Its a bogus screw that does nothing up or down.
You can however easily adjust the temperature.
Luckily, I have several other dependable units to compare.
The company advises using their $60 calibration kit.
Kind of pointless if adjusting the screw does nothing.

Very disappointing I am returning the replacement unit as well
and will avoid this brand in future