Product review (2 stars): Poor sensor, relative humidity readout.
I purchased mine Jan '16.

With the sensor ~20' away the signal would constantly drop. Also outside humidity readout is relative humidity meaning it will be 10 F outside and dry as dust but the humidity will read something like 50% because that's what it is relative to the outside temp. There's no way to change that.

I missed the warranty window so in the trash it goes.