Widex mind440 User Instructions page 22

Each time you operate the volume control, you will hear a beep-
tone unless this function has been disabled. When the maxi-
mum or minimum adjustment level is reached, a steady tone will
sound.
WARNING
If the volume in the hearing aid is generally too loud or too weak, or
the reproduced sounds are distorted, or if you would like any further
information, consult your hearing care professional .
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