Flukers Precision Calibrated Thermometer provides a highly accurate reading of your reptiles terrarium temperature. This durable effective tool makes it easy to regulate the environmental temperature range ETR of your pets habitat in order to promote health activity and long life. For accurate terrarium readings Effectively monitors environmental temperature range Helps maintain a healthy habitat for reptiles and amphibians Range 65 110F Directions Place the thermometer on Inch warm Inch side basking area of enclosure for 30 minutes and compare reading with the specific needs of your pet. If the area is too cool use a higher wattage bulb. If too hot substitute a lower wattage bulb. After establishing the proper temperature for the Inch warm Inch side move thermometer to Inch cool Inch side of enclosure for 30 minutes and record. Establish an appropriate enclosure. Check the ETR regularly. For Reptiles An appropriate ETR for desert reptiles is typically 85 95F temperate species 75 90F and tropical species 80 90F. Free movement between the warm and cool sides of their enclosures is essential. Reptiles should experience a minimal night time drop of 5 10F. For Amphibians Most amphibians can be maintained in an ETR of 70 76F. They do not tolerate temperatures above 82F. They should experience a minimal night time temperature drop of 5 10F.