Some time ago potential purchasers of the (US) PowerFLARM brick were
offered the choice of the bundled display or the 57mm panel mount
display. No information on either seemed to be available from US
dealers so it was impossible to make an informed choice.

Butterfly has advised me that no English manual is available yet but
the German manual can be found he

http://www.butterfly.aero/support/Ha...D_DE_final.pdf

I could not make Babel translate it but my limited German seems to
have allowed me to answer my question on knob functionality. It
appears that the bundled display, like the 57mm display, has 2
independent rotary knobs one of which also acts as a push button
switch.

The 57mm display includes the alarm and there appears to be a menu
setting to adjust the volume.

Butterfly support advised me there is no brightness control for the
57mm display, it is always full bright. I assume the same is true of
the bundled display.

Anyone knowing how to make an internet translation, or willing to
make a human translation, please post.

Andy