Product review (2 stars): Bugged below 10% RH?
I live in Houston..
Inmy house it read about 73F and around 52%RH.
Sounds about right,

I placed it into a container with lots of nicely dried desiccant.

the reading dropped to 30% very quickly... and I watched it drop to 10.1% over about 5 minutes.

Came back after 20 minutes and the reading was 92%.

as far as i can tell the unit has a bug where it reads 99% when it should read 9.9%.

It went down to about "88%" in my container test.
I don't know if this means 8.8% or the unit is bugged/failed.

Let's see what the mfr says. I will update this review.

Attached image of unit reading 81% RH in sealed container with aggressive desiccant.

UPDATE: after another 12 hours the unit reads 1.0%. Very strange. I don't know if that is supposed to mean 1.0% or 0.1%.
(I doubt my test chamber can get to 0.1%)

UPDATE 2: I have tested a 2nd unit and it behaves exactly the same. Further, the units seem to drift. The unit left at ultra low RH now shows lower RH in the same environment as the 2nd unit.

That said I will update the review to 2 stars as the service is rather nice, and the unit is still useful, but they won't acknowledge this is a design problem and not a malfunctioning unit.
I would give it 3-4 stars if they documented the "quick below 10% behavior" somehow at least.