Came quickly. Packed well, without damage. No batteries included. Thermometer works! Accurately measures if to measure 7-10 cm from the head, checked by a mercury thermometer. It is possible to calibrate, but in principle it was not necessary... Even if the error will be in 0,1-0,2 of the proportion of degrees, this does not affect the definition of well-being. The thing is uniquely useful. Highly recommended.
This is different from traditional temperature meter. It doesn't need to touch your body. Just near your body, or forehead, it will give you a temperature. It's really easy and convenient!