The wellworks™ Non-Contact Infrared Thermometer has been specifically designed for safe forehead and object modes. It conveniently works in 1 second in both Celsius and Fahrenheit and has a 10x memory recall to ensure that you can keep track of your family’s health. The 3 colour backlight display will help alert users when temperatures might be outside the range of normal with the following signals: • Green Display with happy face – measurement is below 99.1°F – this is a normal temperature.• Yellow Display with happy face – measurement is below 100°F – this is a normal temperature, but is on the higher end of acceptable. • Red Display with sad face – measurement is above 100°F – this is a high temperature and you should seek medical attention.