ONE-CARE Non-Contact, Infrared body thermometers are used to detect the body temperature of patients of all ages for in-home use and in the clinical environment. Product Features: Non-Contact: Allows to measure body temperature without touching the forehead to prevent cross-infection. Accurate Reading: Equipped with advanced infrared technology and high precision sensor, provides instant reading, taking only 1 second to read the temperature. The accuracy of temperature measurement is within 0.2?. Intelligent: Enables storing up to 50 measurements for model HTD8813, and up to 10 measurements for model HT8818. Silent Mode: Allows the ability to take the temperature without disturbing sleeping babies or toddlers. Adaptable: The device has two units - Fahrenheit °F and Celsius ?. Color Backlight: Representing the measurement results: Green – normal body temperature; yellow – mild fever; red – high fever .