Thermometer is compact and mounts naturally at any desired location inside the reptile's habitat,giving accurate readings in a wide range from 10F to 100F. Thermometer,is an incredibly accurate and easy to read dial-type instrument that is designed for use inside the reptile habitat. Humidity Gauge is custom designed to display comparative readings for desert,moderate or tropical environments.User friendly instructions give general guidelines for the required humidity range of the most commonly kept reptiles.