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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.
What about wireless phone interference with
medical equipment?
Radio frequency energy (RF) from wireless phones can interact with
some electronic devices. For this reason, FDA helped develop a
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