Non-Contact Technology For Safe & Hygienic Use: With a built-in infrared temperature sensor, the PT3 thermometer can read a persons body temperature within 1.18 inches from the center of the forehead without physically touching the person. High Accuracy Via Tri-Point Sensory: An ultra-sensitive infrared sensor collects more than 100 data points per second while distance and environmental sensors work together to account for other variables, ensuring maximum accuracy every time the temperature is taken. Simple, Fast, Clear, And Quiet: With an intuitive single-button control design, the thermometer reads and shows the temperature in just one second on its easy-to-read, extra-large LED display, even in total darkness. When the temperature is read, the device gives a gentle vibration notification to the holding handno beeps or buzzes. Suitable For Wide Usage Scenarios & All Age Groups: This thermometer (model PT3) is designed for all ages, ranging from babies and toddlers to the elderly. An ideal choice for at-home use and for hospitals, hotels, schools, and other public or private establishments.