If you want perfection, no, this is not for you. If you want to know fairly close humidity readings, they're fine. The pace is pretty close. Humidity is 2-4 points above my tested quality. temperature within one degree. So for the price, you can have it in any room or indoor grow room. If you need accuracy, pay $10 or more for each unit. Good for the price. I have a box of 6 pieces.
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