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Health and safety information
Exposure to Radio Frequency (RF) Signals
Certification Information (SAR)
Your wireless USB dongle is a radio transmitter and
receiver. It is designed and manufactured not to exceed
the exposure limits for radio frequency (RF) energy set
by the Federal Communications Commission (FCC) of
the U.S. government. These FCC exposure limits are
derived from the recommendations of two expert
organizations, the National Counsel 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 exposure limit set by the FCC for wireless mobile
USB dongles 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 USB dongles 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 USB dongle
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 USB dongle while operating can
be well below the maximum value. This is because the
USB dongle 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 USB dongle is available for sale to
the public, it must be tested and certified to the FCC
Summary of Contents for SGH-H128
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