A&M XTM S A4, Руководство пользователя

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13
Adjusting the volume
Your hearing instruments automatically adjust the volume
to the listening situation.
> If you prefer manual volume adjustment, use a
smartphone app.
An optional signal can indicate the volume change.
If you turn off the hearing instruments immediately
after changing the volume, the volume change may
not be saved. Wait 5 seconds before turning the
hearing instruments off.