Product review (5 stars): Good monitor.
I am using the humidity monitor in a dehydrator to hatch eggs. I do not trust the built in monitor on the dehydrator so I use this one to have the extra protection of both monitors. This monitor display the temperature both inside and outside the incubator. It also displays the humidity. It runs on 1 AAA battery that is not included. It can be changed to read celsius or fahrenheit. I received the humidity monitor at a discount or free for my honest review.