Took a couple months to start working.

The hygrometer is unfortunately useless. EDIT: The seller was kind enough to refund me and send me an upgraded unit. The hygrometer on the upgraded unit functions poorly, which is an improvement over the original that did not function at all, but is still rather unhelpful. As a seller though, they have been prompt and generous, so I guess it might be worth a roll of the die to see if you get a good one. Double Edit: I've had this on my desk for a couple months just using the thermometer. About a week ago the hydrometer started to work. I haven't had a chance to test the accuracy, but it at least trends up and down with humidity trends, which is usually all you can expect from these type of meters.

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