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academia after extensive reviews of the
scientific literature related to the
biological effects of RF energy.
The RF exposure limit set by the FCC for
wireless mobile devices 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 devices to comply
with a safety limit of 1.6 watts per
kilogram (1.6 W/kg).
The FCC SAR 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 device 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
device while operating can be well below
the maximum reported value. This is
because the device is designed to
operate at multiple power levels so as to