Monster Turbine Copper Pro Advanced Professional In-Ear Speakers with ControlTalk - Manual (Page 7)

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“…a typical person can safely listen to an iPod for 4.6 hours per day at 70% volume.”
“…knowing the levels one is listening to music at, and for how long is extremely important.”
From http://www.cbc.ca/health/story/2006/10/19/music-earphones.html
Get the most out of your equipment and enjoy great audio performance even at safe levels.
Our headphones will allow you to hear more details at lower volume levels than ever before.
physiology of the Ear and Hearing
For additional information on what loud
noises do to your ear and chart reference
http://www.abelard.org/hear/hear.php#loud-music
Use responsibly
Do not use headphones when it’s unsafe to do so – while operating a vehicle, crossing
streets, or during any activity or in an environment where your full attention to your
surroundings is required.
It ‘s dangerous to drive while wearing headphones, and in many places, illegal because
it decreases your chances of hearing life-saving sounds outside of your vehicle, such
as another car’s horn and emergency vehicle sirens.
Please avoid wearing your headphones while driving. Use one of Monster’s FM transmitters
to listen to your mobile media devices instead.
Learn how to establish a safe listening level and review other important safety guidelines
from the Consumer Electronics Association at www.ce.org and the Deafness Research
Foundation at www.drf.org.