Product review (5 stars): Good information, easy to use and read primarily Hydrometer with a temperature indication too.
We are just finishing up a big remodel of our house. New kitchen, a wall gone and a new wood floor throughout the now 'great room'. While floor shopping we kept getting told that relative humidity greatly affects the flooring we were installing. We live in an area that is 'good' in the summer but 'very bad' in the winter due to very cold outside temps and heater or in our case, wood stove heat that dries out a wood floor from October to May.
So I thought it was time to get a reliable hydrometer to get a good reading on what exactly we have.
This unit has good reviews and seems really good. I like the variety of readings available to the user, ease of use, and it sticks to the fridge out of the way with some strong magnets.  Or it can set on a table or hung on a wall.