Amazon Accuracy Reviews Infrared Thermometer Forehead Gun For Humans
How to Use:  
1.Press the body temperature or Surface temperature mode.
2.Align and keep perpendicular thermometer probe of forehead or object with distance about 3-5cm.
3.Press measure key and start to measure.
4.If the temperature is too high, it will alarm point.

Feature
Fahrenheit / Celsius switch
Easily convert fahrenheit to celsius
Fast response time, non-contact and security.
Measuring ambient temperature.
Infrared digital thermometer