Your wrist watch is a radio transmitter and
receiver. It is designed and manufactured not
to exceed the emission limits for exposure to
radiofrequency (RF) energy set by the Federal
Communications Commission of the U.S.
Government. These limits are part of
comprehensive guidelines and establish
permitted levels of RF energy for the general
population. The guidelines are based on
standards that were developed by
independent scientific organizations through
periodic and thorough evaluation of scientific
studies. The standards include a substantial
safety margin designed to assure the safety of
all persons, regardless of age and health. The
exposure standard for wireless mobile phones
employs a unit of measurement known as the
Specific Absorption Rate, or SAR. The SAR limit
set by the FCC is 1.6 W/kg. * Tests for SAR are
conducted 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
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.
Before a phone model is available for sale to
the public, it must be tested and certified to the
FCC that it does not exceed the limit
established by the government adopted
requirement for safe exposure. The tests are
performed in positions and locations (e.g., at
the ear and worn on the body) as required by
the FCC for each model. The highest SAR value
