Nokia Lumia 920 Manual page 43

Certification information (SAR)
This mobile device meets guidelines for exposure to
radio waves.
Your cellular phone is a radio transmitter and receiver. It
is designed not to exceed the limits for exposure to radio
waves recommended by international guidelines. These
guidelines were developed by the independent scientific
organization ICNIRP and include safety margins designed
to assure the protection of all persons, regardless of age
and health.
The exposure guidelines for cellular phone employ a unit
of measurement known as the Specific Absorption Rate
or SAR. The SAR limit stated in the ICNIRP guidelines is 2.0
watts/kilogram (W/kg) averaged over 10 grams of tissue.
Tests for SAR are conducted using standard operating
positions with the device transmitting at its highest
certified power level in all tested frequency bands. The
actual SAR level of an operating device can be below the
maximum value because the device is designed to use only
the power required to reach the network. That amount
changes depending on a number of factors such as how
close you are to a network base station.
The highest SAR value under the ICNIRP guidelines for use
of the device at the ear is 0.68 W/kg. Use of device
accessories may result in different SAR values. SAR values
may vary depending on national reporting and testing
requirements and the network band. Additional SAR
information may be provided under product information
at www.nokia.com.
Your cellular phone is also designed to meet the
requirements for exposure to radio waves established by
the Federal Communications Commission (USA) and
Industry Canada. These requirements set a SAR limit of 1.6
W/kg averaged over one gram of tissue. The highest SAR
value reported under this standard during product
certification for use at the ear is 1.08 W/kg and when
properly worn on the body is 0.91 W/kg.
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