TG8818H LCD Digital Non-contact Infrared Thermometer Measurement modes selection for various needs conveniently. Body temperature measurement: aiming towards the forehead with a distance of 1-15cm. Built-in laser pointer, precise non-contact infrared measurement. Depending on various skin types and thickness, there may be temperature differences. An on-contact body infrared thermometer is specially designed to take the body temperature of a person regardless of room temperature. When the indoor temperature is significantly different, the body infrared thermometer should be placed in that room for 15-20 minutes before using it.