Flukers Precision Calibrated Thermometer provides a highly accurate reading of your reptile's terrarium temperature. This durable, effective tool makes it easy to regulate the environmental temperature range (ETR) of your pet's habitat in order to promote health, activity and long life. For accurate terrarium readingsEffectively monitors environmental temperature rangeHelps maintain a healthy habitat for reptiles and amphibiansPrecision Calibrated Thermometer Range: 65°-110°FDirections: Place the thermometer on "warm" 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 "warm" side, move the thermometer to the "cool" side of the 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°-95°F, temperate species 75°-90°F and tropical species 80°-90°F. Free movement between the warm and cool sides of their enclosures is essential. Reptiles should experience a minimal night-time drop of 5°-10°F. For Amphibians: Most amphibians can be maintained in an ETR of 70°-76°F. They do not tolerate temperatures above 82°F. They should experience a minimal night-time temperature drop of 5°-10°F.