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Health and safety information
convenience and comfort. These systems reduce the
absorption of RF energy in the head because the
phone, which is the source of the RF emissions, will
not be placed 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 companies that sold
devices that claimed to protect wireless phone users
from radiation with making false and
unsubstantiated claims. According to FTC, these
defendants lacked a reasonable basis to
substantiate their claim.