The device requires quite a high brightness of the screen. Had provide from 60% to 80% high, otherwise there will only be faulty transmission. As my screens have an automatic brightness adjustment, it is partly the evening and morning problematic if the room is illuminated only by the lights and the screen darkens ...
The manual entry of data must be done quickly, as the unit will abort the process. In my bank, the data are presented for unfortunately quite confusing, I have from the long rows of letters and numbers to seek and therefore this mode is useless for me.
