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These FCC RF exposure limits are derived from the recommendations of two expert
organizations: the National Council on Radiation Protection and Measurement
(NCRP) and the Institute of Electrical and 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 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.