SAFE TO USE: The product adopts the optical principle, the measured temperature for humans and accuracy is controlled at ± 0.3 , and the accuracy is high. SIMPLE OPERATIO: The product supports one-button temperature measurement. The thermometer will quickly measure temperature when the trigger is pressed. 3 FRIENDLY FUNCTION: FEVER ALARM: set the alarm temperature as you want(default temperature is 38C).RECORDS: Maximum 32 testing records can be saved.OVER RANGE SHOWS: "HI" or "LO" on LCD INFRARED FOREHEAD THERMOMETER USED WIDELY: It is suitable for families, hotel, library, enterprises and institutions, school, customs, railway station and airport, etc, and also can use in hospital for screen function.