GreatCall Jitterbug How-To Manual page 154

be used with wireless phones for 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
Health and Safety Information 143