Small pocket-sized infrared thermometer that instantly measures terrarium temperatures with the click of a button. Great for monitoring basking sites shelters thermal gradients incubation and hibernation temperatures. Can be set to read temperatures at both fahrenheit or celsius. Min/max function that allows you to monitor the fluctuations in your terrarium over time. Temperatures measurement range of -28 to 230 degrees fahrenheit and -33 to 110 degrees celsius. Includes one cr2082 lithium cell battery