Thermometers are generally used under the armpits, mouth, rectum, etc. In practical applications, people generally feel inconvenient or uncomfortable. The ear thermometer measures the temperature of the human body in a non-contact manner by measuring the radiance of the ear tympanic membrane. Just point the probe at the inner ear canal and press the measurement button to get the measurement data in just a few seconds. It is very suitable for patients with severe illness, the elderly, infants and children. However, in the early stage of use, users may get several different measurement data because they are not familiar with this operation mode. Generally, the measured maximum value is the required data. The user will be more satisfied with the thermometer after familiarity.