Product review (5 stars): Nifty tool for temperature/humidity tracking
This is a great tool for monitoring temperatures! It uses very little power so you don't have to change the batteries often (although I use reuseable batteries anyway, so it's not a big deal, but still). We initially got it to see what the temperature difference was between the basement and the ground level so we could monitor the house temperature more accurately, but recently we have been using it as it is intended and put the outdoor unit in our back yard. It is pretty accurate, and it's really nice to be able to track the humidity. Low humidity on a winter day makes my skin feel horrible, and high humidity on a summer day makes the heat unbearable even if it's not that hot- this tool will help you find that sweet spot for temperature and humidity control.

The unit itself doesn't take up too much space. It is about the size of an adult hand, but double the thickness. We keep ours in the living room so it isn't affected by heat from people cooking in the kitchen.