Allows precise monitoring of both temperature and humidity in your hermit crab's home. ÿTemperature and humidity levels are extremely important for the long term health of your hermit crabs. ÿMaintaining proper temperature and humidity levels will allow your hermit crabs to properly digest and metabolize food and facilitate shedding (molting). ÿThis will help to decrease stress levels and prevent against possible illness and disease. ÿUnique Velcro backing enables easy removal for the cleaning of your crab's enclosure.