This device measures a person's temperature on their forehead without contacting the skin, making it an ultra-hygienic choice. It also eliminates the need for probe covers and the associated cost and storage. To help streamline the temperature-reading process, the thermometer features a 1:1 distance to spot ratio and reads temperatures from 89.6 to 109.4 degrees Fahrenheit with an accuracy +/-0.4 degrees Fahrenheit. To use, simply press the on button, hit "start," and position the device 2 to 3 cm from the forehead. The infrared technology detects the intensity of the light emitted from the forehead and converts it into a temperature reading on the large LCD display. This process takes just one second. It beeps when finished and then automatically turns off after inactivity.