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Health and Safety Information 120
against the head. On the other hand, if
the phone is mounted against the waist
or other part of the body during use,
then that part of the body will absorb
more RF energy. Wireless phones
marketed in the U.S. are required to
meet safety requirements regardless of
whether they are used against the head
or against the body. Either configuration
should result in compliance with the
safety limit.
Do wireless phone accessories that
claim to shield
the head from RF radiation work?
Since there are no known risks from
exposure to RF emissions from wireless
phones, there is no reason to believe
that accessories that claim to shield the
head from those emissions reduce risks.
Some products that claim to shield the
user from RF absorption use special
phone cases, while others involve
nothing more than a metallic accessory
attached to the phone. Studies have
shown that these products generally do
not work as advertised. Unlike "hand-
free" kits, these so-called "shields" may
interfere with proper operation of the
phone. The phone may be forced to
boost its power to compensate, leading
to an increase in RF absorption. In
February 2002, the Federal trade
Commission (FTC) charged two
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