Non-Contact Design: The infrared thermometer is specially designed to take the body temperature of a person, regardless of room temperature. Multi-Mode Thermometer: The gun thermometer is designed for all ages, adults, infants, and elders. It not only supports the forehead or ear function but is able to measure the temperature of liquid, object, and room. One button to switch between ? and ?. Fever Alert: The display of this digital thermometer lights up in green for normal, orange for a slight fever (or medium temperature), or red for a high-grade temperature. Showing you how serious the fever is - even in the dark Memory Recall: Thermometer can store and recall up to 32 readings for better tracking the changes in body temperature. Applications: The digital thermometer is widely used for home healthcare, childcare centers, nursery, clinic, school, job site, and many other occasions.   The infrared thermometer is specially designed to take the body temperature of a person, regardless of room temperature. No Touch Function can avoid touching the skin and help prevent cross-infection between multiple people; For this infrared thermometer, you won’t need to even touch your or your child’s forehead to determine the temperature. The gun thermometer is designed for all ages, adults, infants, and elders. It not only supports the forehead or ear function but is able to measure the temperature of liquid, object, and room. One button to converse between ? and ?. The display of this digital thermometer lights up in green for normal, orange for a slight fever (or medium temperature), or red for a high-grade temperature. Showing you how serious the fever is - even in the dark The thermometer can store and recall up to 32 readings for better tracking the changes in body temperature. The digital thermometer is widely used for home healthcare, medical institutes, nursery, clinic, school, and many other occasions. Specification Effective distance: 1 cm-5 cm Range: Body temperature (32-42.9°C/89.6-109.2°F), Object temperature (0-100°C/32-212°F) Accuracy: Body temperature ±0.2°C /±0.4°F, Object temperature ±1.0°C /±1.8°F Display resolution: 0.1°C/0.1°F Resolution 0.1°C Power supply: d.c.3V 2 AA alkaline battery Memory: Automatic recall of 32 memories Display: LCD backlit display Reading Scale Celsius or Fahrenheit Automatic Shut off in 60 sec Features FDA Approved Ergonomic no-touch design 32 sets of memory data Large LCD backlit display 0.1 degree margin of error Displays in Fahrenheit or Celsius Clinically calibrated for medical use; unfailingly accurate Fever Alerts: 3-color Backlight & Beep Simple and easy to use for elderly and children Please make sure to remove the sweat and hair on the forehead before the measurement. Use this thermometer is not intended as a substitute for consultation with your physician. Carefully check the negative and positive of the battery compartment when loading the batteries. Warning: Please do not install the batteries in the opposite position. To change the settings from Celsius to Fahrenheit: Press and hold (set memory) for 4 seconds, Press again (set memory), F-3 appears, Press the (+) key, and then display ?