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http://www.fcc.gov/cgb/sar.

Consumer Information on Wireless Phones

The U.S. Food and Drug Administration (FDA) has published a series of

Questions and Answers for consumers relating to radio frequency (RF)

exposure from wireless phones. The FDA publication includes the

following information:

What kinds of phones are the subject of this update?

The term wireless phone refers here to hand-held wireless phones with

built-in antennas, often called "cell," "mobile," or "PCS" phones. These

types of wireless phones can expose the user to measurable radio

frequency energy (RF) because of the short distance between the phone

and the user's head. These RF exposures are limited by Federal

Communications Commission safety guidelines that were developed with

the advice of FDA and other federal health and safety agencies. When the

phone is located at greater distances from the user, the exposure to RF is

drastically lower because a person's RF exposure decreases rapidly with

increasing distance from the source. The so-called "cordless phones,"

which have a base unit connected to the telephone wiring in a house,

typically operate at far lower power levels, and thus produce RF

exposures well within the FCC's compliance limits.

Do wireless phones pose a health hazard?

The available scientific evidence does not show that any health problems

are associated with using wireless phones. There is no proof, however,

that wireless phones are absolutely safe. Wireless phones emit low levels

of radio frequency energy (RF) in the microwave range while being used.

They also emit very low levels of RF when in the stand-by mode. Whereas

high levels of RF can produce health effects (by heating tissue), exposure

to low level RF that does not produce heating effects causes no known

adverse health effects. Many studies of low level RF exposures have not

found any biological effects. Some studies have suggested that some

biological effects may occur, but such findings have not been confirmed

by additional research. In some cases, other researchers have had

difficulty in reproducing those studies, or in determining the reasons for

inconsistent results.

What is FDA's role concerning the safety of wireless phones?

Under the law, FDA does not review the safety of radiation-emitting

consumer products such as wireless phones before they can be sold, as it

does with new drugs or medical devices. However, the agency has

authority to take action if wireless phones are shown to emit radio

frequency energy (RF) at a level that is hazardous to the user. In such a

case, FDA could require the manufacturers of wireless phones to notify

users of the health hazard and to repair, replace or recall the phones so

that the hazard no longer exists.

Although the existing scientific data do not justify FDA regulatory actions,

FDA has urged the wireless phone industry to take a number of steps,