The Exo Terra® Analog Hygrometer allows you to easily and accurately monitor the humidity level in your terrarium. Reptiles and amphibians have very specific humidity requirements. Inappropriate levels can lead to various problems, such as electrolyte imbalances, dehydration, difficulty shedding, respiratory infections, and more. Since humidity requirements vary depending on the species and their natural environment, it is important to know the specific needs of your reptile or amphibian. Easy to read and install, this hygrometer helps you maintain a healthy and natural environment in your terrarium. Keep a precise eye on your terrarium's humidity with the Exo Terra® Analog Hygrometer and provide your reptiles and amphibians with a healthy environment for their well-being and health.