I got 8 units for the price ($13 after tax). After the item arrives, measure at three time points (15 minutes of each reading at around 20°C / 40% noise) with a much more expensive thermometer/hygrometer as a control. The average temperature is 0.2°C higher (SD 0.5) and humidity 2.5% higher (SD 1.3) than my control equipment. These devices meet my expectations for a temperature of 1°C and a humidity of 5%. I think it's a good buy for this price.
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