I really like this room thermometer. I wanted something simple for my kid's room to check the humidity and how far their heater thermometer is from the actual room temperature (a 5 degree difference which I was expecting and which is typical). It seems to work great, easy to use - not much "adjustment" on it. I love that you can choose the color to match your decor. More than I thought, which I think is better than less than expected. You can mount it on the wall or place a stand on the back to display it on a table. The smiley appears when the humidity is between 40 and 60%. We're hovering between 38-41%, which sounds something like this. Comes with button cell battery. Thinking about buying another one for the first floor of our house. Very happy with this purchase.
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