Fine the missing manual is added now.
But, as I mentioned, the US and the EU manual of the ZERO is identical. as far I see. One is enough.
What I am still missing:
I could not find some infos about the LED near the ON/OFF knob.
As far I see:
When maximum loudness is reached by pressing the "+" it starts blinking
and as well it starts blinking when battery needs to be charged soon.
Am I right?