Safety and usage information
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Electronics Engineers (IEEE). In both
cases, the recommendations were
developed by scientific and engineering
experts drawn from industry,
government, and academia after
extensive reviews of the scientific
literature related to the biological effects
of RF energy.
The exposure limit set by the FCC for
wireless mobile phones employs a unit of
measurement known as the Specific
Absorption Rate (SAR). The SAR is a
measure of the rate of absorption of RF
energy by the human body expressed in
units of watts per kilogram (W/kg). The
FCC requires wireless phones to comply
with a safety limit of 1.6 watts per
kilogram (1.6 W/kg). The FCC exposure
limit incorporates a substantial margin of
safety to give additional protection to the
public and to account for any variations
in measurements.
SAR tests are conducted using standard
operating positions accepted by the FCC
with the phone transmitting at its highest
certified power level in all tested
frequency bands. Although the SAR is
determined at the highest certified power
level, the actual SAR level of the phone
while operating can be well below the
maximum value. This is because the
phone is designed to operate at multiple
power levels so as to use only the power
required to reach the network. In
general, the closer you are to a wireless
base station antenna, the lower the
power output.
Before a new model phone is available for
sale to the public, it must be tested and
certified to the FCC that it does not
exceed the exposure limit established by
the FCC. Tests for each model phone are
performed in positions and locations (e.g.
at the ear and worn on the body) as
required by the FCC.