The device was purchased today and was checked in every aspect. Firstly and most importantly, it does not measure body temperature. Now, compared to a precision temperature sensor (PT-100 3-wire), it has exactly one degree difference in surfaces and liquids. The measurement was taken in cold water and on hot and cold surfaces. For the money, I expected much worse results, but in the end, it does its job and very well indeed.

Very useful tool for anyone who wants to easily and quickly measure the temperature of an object. Personally, I have had it for 5 days and I am thrilled. Personally, I would recommend it.