The design is simple, only the surface shines like a mirror. The protective film, which is on it, I let it better.
Four small, circular Leuchen give the charge level, LWA. Available on the charge. In her mid-Drucknopf is to enable the Bank. Off she goes to 0 sec. if no device is connected.
This works great as well, when a device is fully charged.
Since I have been playing with some of the bank, also the protection mechanisms have proved useful. However, the bank does not work then first. Whether it goes away with time, I do not know. I have the bank simply hung briefly to the supplied charger and already they worked perfectly again.
All in all the right buying decision.