The infrared thermometer is intended to obtain the body temperature from the forehead. It may be used by professionals or by consumers in a home environment. The temperature may differ slightly at different parts of the torso, ear canal, armpit, mouth, or anus. The forehead symbol indicates the Forehead temperature mode. House symbol means 'object temperature' thermometer for Ambient Temperature 2.Easy operation Hand-held design, easy operation One-click automatic temperature measurement 3.Quick response the thermometer is suitable for an indoor environment without strong air convection. The forehead has no sweat and no hairs covered before measuring the temperature of a face mask or earbuds. Make sure the sensing head is free of foreign matters before use.