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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,

including the following:

"Support needed research into possible biological effects of RF of

the type emitted by wireless phones;

"Design wireless phones in a way that minimizes any RF exposure

to the user that is not necessary for device function; and

"Cooperate in providing users of wireless phones with the best

possible information on possible effects of wireless phone use on

human health.

FDA belongs to an interagency working group of the federal agencies that

have responsibility for different aspects of RF safety to ensure coordinated

efforts at the federal level. The following agencies belong to this working

group:

"National Institute for Occupational Safety and Health

"Environmental Protection Agency

"Federal Communications Commission

"Occupational Safety and Health Administration

"National Telecommunications and Information Administration