Title: Do not buy
Review: I needed a new hygrometer for my humidor. I ordered this one because it was a great price. I was never able to properly calibrate it as the adjustment knob never worked. I decided not to calibrate it and stuck it straight in my humidor. After it was in there for about 20 mins, it read 99% humidity and then shut off and never turned back on. Do not buy. Spend the extra money and get a better product.
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