Product review (3 stars): Cheap and Compact, but RH reads high
Temperature accurate, matching other thermometers to within a degree.

RH about 5 to 6% high, IMHO.

I judged by comparing it to a Caliber IV hygrometer which was inside a jar with a 58% Boveda constant humidity pack.  The Caliber was right on, this was high.

Nice and small.