Product review (1 stars): Should Name These Things "VarianceRite"
Can't trust the measurements.  I had on unit and bought two more to use in different areas our home.  But for kicks I lined up all three next to each other in one medium to large-sized room for several days to find out if they would show the same temp and humidity levels - they didn't and don't.  I observed 3 different humidity level readings which varied as much as 6%, and the temperature readings varied by as much as 4 degrees.  Further, the humidity readings were usually within 1%-2% of each other in the low humidity ranges, such as 30%-38%, but at higher humidity levels the readings were all over the map with much greater variances between the three units.  Same thing happened for temperature readings, they seemed closer at lower temperatures than at room temperatures (65-74 degrees).  Seems these things are not calibrated or calibrated very poorly, so poorly, I can't trust the readings form any of them and have no way to know which of the three units is closest to being accurate.  I'm now looking for another manufacturer and model that at least produces more reliable readings.