Do not listen at extremely high volume levels. Extended, high-volume listening can lead to permanent hearing loss.

Always start by setting the volume to the lowest level possible before you begin listening, then gradually increase the volume as necessary.

Once you set the volume, do not increase it. Over a period of time, your ears adapt to the volume level, so a volume level that does not cause discomfort might still damage your hearing.

Page 8
Image 8
Optimus 120-1971B manual