In my old apartment I had some teu8rere model who had a "mildew warning function". I find this form, however, visually 100 times more beautiful and they look out of quality! They are quite small and can easily be operated and read off. I had mold problems and can now always understand when I have to ventilate or heat once more. One should at mold problems though purely read into the topic which heat and ventilate concerns in order to act properly, but then the parts help ... My super mold problem is solved