This digital infrared thermometer has a LCD Display that shows both Celsius and Fahrenheit scales on a backlit screen. Quick and easy to use while taking the temperature at a safe distance. Turn on the thermometer and scan the forehead without touching the skin. Results will display on the screen with either a green (normal), yellow (low fever) or red (high fever) back light. Useful safety product for the work place, medical offices, dentist, day cares and other offices where personal protection is required. Effective measuring distance: 3-5 cm. Uses 2 AA Batteries(not included).