Liquid crystal thermometer for all types of reptile, amphibian or invertebrate enclosures. Scale from 70° to 105°F (21° to 40°C), with easy to read crystal coloring. Proper temperatures are a necessity for digestion and metabolic functions in reptiles and amphibians. This is the ideal "first time" thermometer for any cage, a reptile should never be sold or bought without one! A great additional thermometer (when using the Precision Analog Thermometer or Precision Analog Thermometer & Humidity Gauge) for monitoring heat gradients.