iHealth PT3 thermometer is only designed to test the human body temperature with the measurement position as the center of the forehead surface. It is not designed to measure objects and ambient temperatures.
*credit to Sylvain of iHealth Labs EU
https://helpcenter.ihealthlabs.eu/hc/en-gb/articles/360007199517-iHealth-PT3-What-type-of-measurement-is-performed-