The new Reptitemp digital Infrared Thermometer is a small pocked sized infared thermometer that instantly measures terrarium temperatures with the click of a button. This great new tool will allow keepers to monitor thermal gradients, basking sites, shelters, incubation and hibernation temperatures and more. Reptitemp Digital Thermometer can be set to read temperatures in both Fahrenheit (-28 to 230 degrees F) or Celsius (-33 to 110 degrees C). There is a Min/Max function that allows you to monitor the fluctuations in your terrarium over time. The kit includes one CR2032 lithium cell battery so its ready to be used out of the box.