CHF26.90
TFA Icon
Question about TFA Icon
I received it and supposedly, it should work with both power supply and battery, right? It doesn't work with batteries without power supply. Then what does it means 'back-up battery'?
Hello,
The illumination of the numbers is only possible in power supply operation. The batteries are optinal and serve as a backup, for example in case of a power failure.
With best regards
TFA Dostmann
Customer service