Review on JEDEW Mini Hygrometer Thermometer - Accurate LCD Monitor for Indoor/Outdoor Humidity & Temperature Measurement - Ideal for Humidifiers, Dehumidifiers, Greenhouse, Reptile Environments, Plants & More by Ray Mcknight

Wanted to try these sensors as they had good reviews and the price was attractive for what you get. Having had them for a month now I can say that they are doing their job adequately. They're accurate, but for some reason it takes a while to catch up with actual humidity and temperature. I know this because I have multiple calibrated devices that control my cigar fridge and desktop humidors. If you're looking for something that will give you accurate readings out of the box, I would look for a more expensive hygrometer, except all four work as they should.