D.A.S. Audio Aero 40A - Manual (Page 15)

On the other hand, if from the ‘Configuration’ menu we push right, we log
in to ‘Utilities’ menu, pushing ‘OK’ to select.
Actually, in this menu, we only could restore the factory settings (including
gain 0 dB and delay 0 ms), using the arrows which are shown on the screen,
keeping ‘OK’ pushed to select.
At last, appearing on the screen the settings:
It is very recommendable to restore factory settings after each use
and before setting up a new system configuration.
15 Manual del Usuario / aero 40A / User’s Manual
At last,
menu.
if we push right in ‘Utilities’ menu we will log in to ‘Information’