LG Optimus M+ MS695 Quick Reference Manual page 49

Safety
47
Set the volume in a quiet environment and select the
lowest volume at which you can hear adequately.
When using headphones, turn the volume down if
you cannot hear the people speaking near you or
if the person sitting next to you can hear what you
are listening to.
Do not turn the volume up to block out noisy
surroundings. If you choose to listen to your
portable device in a noisy environment, use noise-
cancelling headphones to block out background
environmental noise.
Limit the amount of time you listen. As the volume
increases, less time is required before your hearing
could be affected.
Avoid using headphones after exposure to extremely
loud noises, such as rock concerts, that might cause
temporary hearing loss. Temporary hearing loss
might cause unsafe volumes to sound normal.
Do not listen at any volume that causes you
discomfort. If you experience ringing in your ears,
hear muffled speech or experience any temporary
hearing difficulty after listening to your portable
audio device, discontinue use and consult your
doctor.