Classic Alarm Clock. The classic and simple alarm clock features a nostalgic design and is easy to use. Thanks to the backlight, the time is readable even in the dark. The snooze function is included. The clock operates with a 1 x 1.5 V C battery, which is not included in the package. 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, which are continuously developed in collaboration with meteorologists, IT specialists, and designers.