For Your Safety
16
ZNFV500. Additional information on Specific
Absorption Rates (SAR) can be found on the
Cellular Telecommunications Industry Association
(CTIA) website at http://www.ctia.org/.
* In the United States and Canada, the SAR limit
for mobile device used by the public is 1.6watts/
kg (W/kg) averaged over one gram of tissue. The
standard incorporates a substantial margin of
safety to give additional protection for the public
and to account for any variations in measurements.
Caution:
Avoid potential hearing loss.
Prolonged exposure to loud sounds (including
music) is the most common cause of preventable
hearing loss. Some scientific research suggests
that using portable audio devices, such as
portable music players and cellular telephones,
at high volume settings for long durations may
lead to permanent noise-induced hearing loss.
This includes the use of headphones (including
headsets, earbuds and Bluetooth® or other wireless
devices). Exposure to very loud sound has also
been associated in some studies with tinnitus (a
ringing in the ear), hypersensitivity to sound and
distorted hearing. Individual susceptibility to noise-
induced hearing loss and other potential hearing
problems varies. The amount of sound produced
by a portable audio device varies depending on the
nature of the sound, the device, the device settings
and the headphones. You should follow some
commonsense recommendations when using any
portable audio device:
• 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.
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