Review on 🌡️ JEDEW 2-Pack Mini Hygrometer Thermometer: Ultimate Digital LCD Monitor for Indoor/Outdoor Humidity Meter, Temperature Control in Humidifiers, Dehumidifiers, Greenhouses, Reptile Habitats, Plants, and Humidors - Fahrenheit(℉) or Celsius(℃) by Terry Napoleon

They come in pairs. I have both in the same environment (mushroom pod), sitting next to each other, and they never give anywhere near the same readings. One shows 78% humidity and the other 90%. BTW, 90% is the highest value they give. Even if I know it should be higher, I will see the readings increase very quickly, but then I will stop at 90% and not go back up. (If I happened to have a camera that somehow held a perfectly constant 90%, I would expect the readings to ramp up more slowly and narrowly. It doesn't. It ramps up to 90% quickly and then just stops.) On the Back The control panel has a button to toggle between Fahrenheit and Celsius. I pressed one of them once and it toggled and now it refuses to toggle back. Now this button doesn't work. I say spend a little more for something better.