Review on 2 Pack Indoor Humidity Meters - Thermometer Hygrometer for Living Room, Bedroom, Reptiles, Greenhouse, Basement, Guitar - Temperature and Humidity Monitor by Michelle Lynn

I bought this for my indoor garden. I've had problems with powdery mildew so I had to start monitoring my humidity levels. It's a nice, simple gadget that's easy to use. You can program it to show degrees Celsius or Fahrenheit and toggling between them is very easy. I checked the outside temperature to verify accuracy. It was right there. I really like that there are two of them in the set. I left one in the greenhouse and put the other in the kitchen. Now I know at a glance if the humidity is too high to make candy.