Maintain an ideal humidity level in your reptile's habitat with the Exo Terra Analog Hygrometer for Reptiles. This analog hygrometer features a simple design with a colorful display and clearly marked intervals. You can monitor your pet’s environment to make sure it has just the right amount of moisture in the air with dry， moderate and humid ranges. It’s easy to read and install， and ideal for maintaining the proper humidity to keep your reptile healthy.