Product review (4 stars): Cheap, not sure how accurate though.
For the cost it is the best deal I think I have found.

Not sure how accurate it is though.  I have a more expensive humidity meter and they are about 5-7% different when placed beside each other.

Not sure which one is incorrect.

I use this one during the winter and keep the room it is in at 50% humidity level with my humidifier.

This is a great thing to have when the heat is on during the winter.

Sinus problems, respiratory issues, and dry skin are just a few of the things that happen in dry environments.

The printed meter on the unit explains what is a good level of humidity is for different situations.