Samsung Galaxy S4 User Manual page 196

The RF 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 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 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 reported 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 of the phone.
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 SAR limit established by the FCC. Tests for each
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model phone are performed in positions and locations (e.g. at
the ear and worn on the body) as required by the FCC. For
body-worn operation, this phone has been tested and meets
FCC RF exposure guidelines when used with an accessory
that contains no metal and that positions the mobile device a
minimum of 1.0 cm from the body.
Use of other accessories may not ensure compliance with
FCC RF exposure guidelines. The FCC has granted an
Equipment Authorization for this mobile device with all
reported SAR levels evaluated as in compliance with the FCC
RF exposure guidelines. This mobile phone has a FCC ID
number: A3LSCHR970C [Model Number: SCH-R970C] and
the specific SAR levels for this mobile phone can be found at
the following FCC website:
http://www.fcc.gov/oet/ea/.
The SAR information for this device can also be found on
Samsung's website:
http://www.samsung.com/sar.
SAR information on this and other model devices can be
accessed online on the FCC's website through
transition.fcc.gov/oet/rfsafety/sar.html. To find information that
pertains to a particular model device, this site uses the
device FCC ID number which is usually printed somewhere
http://