We have ordered a total of 3 different thermal / hygrometer TFA. 2 days put all to the same place. I do not know which indicates the physically correct values, but this here has had the greatest deviations from the other (5 degrees / 10%). Therefore, we have drawn the conclusion that it is most likely wrong measures and sent it back. It is important that we get from all the rooms as possible identical and authentic values! But otherwise nice design and even with battery. Alone we could keep it if necessary.
