Review on 12-Pack Small Digital Temperature Humidity Meters Gauge Indoor Thermometer Hygrometer LCD Display Fahrenheit (℉) for Humidors, Greenhouse, Garden, Cellar by Matt Conner

Surprisingly cheap. I have read all the negative reviews. After using the product for several weeks, I am satisfied. No, they will not read the same number in the same environment. The product data shows that the relative humidity accuracy is +/- 4%. It's not great, but if you read the specs of ALL the competitors, they're no better. So you should expect some variation, but no more than 4%, which is the industry norm. Temp is slightly better again, consistent with others. I place them in my treatment jars to have a permanent storage medium for my herbs. I roll and shake the jars to avoid settling/sticking. None of these sensors broke or were damaged as a result. 2 weeks isn't that long, but none of the batteries died. At this price I was expecting some dead batteries. Overall they work great for me. If any break or die I will buy them again.