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Cardiac pacemakers (applies only to digital cordless telephones):
Wireless Technology Research, LLC (WTR), an independent research entity, led a multidisciplinary evaluation
of the interference between portable wireless telephones and implanted cardiac pacemakers. Supported by
the U.S. Food and Drug Administration, WTR recommends to physicians that:
Pacemaker patients
• Should keep the wireless telephone at least 30 cm from the pacemaker.
• Should NOT place wireless telephones directly over the pacemaker, such as in a breast pocket, when it is
turned ON.
• Should use the wireless telephone at the ear opposite the pacemaker.
WTR’s evaluation did not identify any risk to bystanders with pacemakers from other persons using wireless
telephones.
About wireless microphones
• Privacy:
The same features that make a wireless microphone convenient create some limitations. Calls on
conference phones are transmitted between the base unit and the wireless microphone by radio waves, so
there is a possibility that the wireless microphone conversations could be intercepted by radio receiving
equipment within range of the wireless microphone. For this reason, you should not think of conference
phone conversations as being as private as those on corded telephones.
• Electrical power:
The base unit of this conference phone must be connected to a working electrical outlet.
The electrical outlet should not be controlled by a wall switch. Calls cannot be made from the conference
phone if the base unit is unplugged, switched off or if the electrical power
is interrupted.
• Potential TV interference:
Wireless microphone operates at frequencies that may cause interference to
televisions and VCRs. To minimize or prevent such interference, do not place the base unit near or on top
of a TV or VCR. If interference is experienced, moving the wireless microphone farther away from the TV or
VCR often reduces or eliminates the interference.
• Rechargeable batteries:
Exercise care in handling batteries in order not to create a short circuit with
conducting material such as rings, bracelets and keys. The battery or conductor may overheat and
cause harm.
• Nickel-metal hydride rechargeable batteries:
Dispose of these batteries in a safe manner. Do not burn
or puncture. Like other batteries of this type, if burned or punctured, they could release caustic material
which could cause injury
.
Precautions for users of implanted cardiac pacemakers
