Review on 🌡️ Mini Hygrometer Thermometer: Digital Fahrenheit Temperature Humidity Meter with LCD Display - Perfect for Home, Incubators, Reptile Greenhouse, and Office (Black, 8) by Steve Snyder

I opened all 8, put them on a tray and waited for them to normalize on household indicators. For about 20 minutes everyone read the temperature within 4 degrees Fahrenheit, which is normal, but only 7 of them registered the correct humidity with an accuracy of 3%. This last kid insists it's 10 degrees Fahrenheit, even though everyone else agrees the house is about 68 degrees. I opened the back and made sure there were two button cell batteries installed in this one, closed it again, no change so I think the last one just came out of the cold. What a hey, about $2 each, I 7/8 agree with the purchase.