This Infrared Thermometer accurately measures a person’s body temperature in one second. A reading is taken as soon as an individual’s forehead is detected within 2-4 inches of the thermometer’s sensor. Precision tolerance is ±0.32 ℉. A green light will indicate that their temperature is within a normal range, and a flashing red light and the audible alarm will indicate that the person has a high temperature. Designed for people of all ages, including infants, children, adults, and seniors. Perfect for deploying in high-density areas. Great used for in offices, supermarkets, shops, restaurants, apartments, hotels, train stations, community centers, and building entrances.