I've had a thermometer/hygrometer combo in almost every room in my house ever since we had a moisture problem in our basement. Constant monitoring to make sure the problem didn't happen again and it helped me determine how terrible our upstairs bathroom fans were. The humidity in the bathrooms reached over 80% and the fans did nothing to lower it. Replaced them with much better units and this problem was gone. I wanted these exact units because they are so tiny! I have others of various shapes and sizes, but I needed some that were a bit more hidden, like the one in the small downstairs bathroom where you hardly notice when you're sitting on a shelf. Very compact. I can also confirm their accuracy. They match the other blocks of mine exactly (I have more than 12 of different brands now), the difference is only 1-2 degrees in temperature and within 3-4% humidity. if necessary - they serve their purpose and are very compact.
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