Product review (4 stars): useful package as well
This is a very inexpensive solution to a common need, and in an attractive, useful package as well. I grow about thirty exotic tropical plants in my midlands, USA apartment. Winters can be tough on my collection due to low temperatures, weak sunlight, and very low humidity during sub-freezing weather. Most of my plants want humidity of 40% or higher, while central heating makes it about 15% indoors. Keeping track of my temp. and humidity helps me care for my collection better thru these harsh months.
For any user these data can also help manage energy usage in the home and perhaps help respiratory health, since low humidity can be as tough on your noose as your house plants.
There is a fold-out stand so your meter can sit on a desk or shelf and a fairly strong magnetic plate on the back to attach it to any ferrous surface, a refrigerator, perhaps.