Funny there are two packs. Because you can put both in the same place to see if they read the same thing. Not really. Humidity meters differ by about 5%, temperature - by 1. The hygrometer interested me the most, so at first it disappointed me a little. But they're both responsive and that's really the main thing I was hoping to keep in mind, so I'm happy with the low price. In addition, they are easy to read at a glance.
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