This infrared forehead thermometer is a high-quality products. It uses infrared technology. Each time it is turned on , it will enter a self-test to ensurer the accuracy of the measurement. This infrared themometer is mainly used to measure the temperature of the human forehead. This product can accurately and stably perform temperature measurement. Users only need to point the probe head to the forehead and press the measurement button, and the body temperature wcan be measured quickly and accurately in one second. In order to ensure the accuracy of the measurement results and the safety of use, please read this instuctions carefuly before used. This products is widely used in schools, customs, hospitals, homes,ect.