The compass is accurate with the time and date. The altimeter measures the height accurately, even in an elevator, with a sensitivity of one meter. However, the thermometer may be off by 3-4 degrees, possibly because it is held in the palm of your hand. The barometer is not very accurate either, as it often falls inside. The manufacturer does not specify the distance it measures. Overall, it is quite good for its price! But it is understood that at this price, it is more of a "toy". Other altimeters cost 100€ and above.

It is impressive how the height indication changes with the sensitivity of a meter when, for example, you enter the elevator!! Very good gadget for its money, the weather forecast and compass are useful