Frontal temperature gun can only be used correctly to measure accurately: 1, in the measurement of body temperature should be pointed to the forehead gun in the middle of the forehead and keep straight, to avoid clothing or hair blocking the distance. 2, the forehead temperature gun and the skin to maintain a 3-5cm, should not be too far away. 3, the forehead does not sweat will be a large amount of heat dissipation, so that the temperature of the forehead down, the measurement of the head should be wiped dry when the sweat in case of measurement of the bias in the measurement, in the measurement of the outside should be removed clothing to avoid foreign objects cover, such as the measurement of the wrist or neck will be more accurate. When measuring outdoors, you should remove your clothes to avoid covering foreign objects, for example, measuring the wrist or neck will be more accurate. It is recommended to take measurements every 10 minutes and take the average of the three measurements, so that the value is relatively accurate.