4-piece digital thermo-hygrometer set with comfort zone. Ideal for monitoring indoor climate. Displays indoor temperature and humidity. Features a smiley face as a comfort zone indicator. Particularly small and compact. Flexible mounting with adhesive film and stand. Includes 1x 3 V CR2032 battery. TFA Dostmann. With over 1000 weather and measuring instruments, the German company TFA Dostmann is one of the leading companies in the industry in Europe. The TFA range is characterized by its own innovative technologies and exclusive designs, continuously developed in collaboration with meteorologists, IT specialists, and designers.