We like this reliable, easy to use, Digital IR (Infrared) Surface Thermometer because it’s an economical way to actually know that the surface temperatures in your reptile’s habitat are where they need to be. No assuming, no guessing, no bad surprises later. The basking spot surface temperature directly affects your reptile’s activity level, appetite and ability to digest his food properly for good nutrition. Many reptiles such as bearded dragons “self-thermogate”; moving from basking spot to cool area and back. This way they maintain the appropriate body temperature levels and stay comfortable; since they don’t sweat like mammals do. Therefore, it is also important to actually know what your habitat’s cool area temperature is.