Retevis RT639 Mode D'emploi page 7

Unauthorized modification and adjustment
Changes or modifications not expressly approved by the
party responsible for compliance may void the user's
authority granted by the local government radio
management departments to operate this radio and should
not be made. To comply with the corresponding
requirements, transmitter adjustments should be made only
by or under the supervision
of a person certified as technically qualified to perform
transmitter maintenance and repairs in the private land
mobile and fixed services as certified by an organization
representative of the user of those services.Replacement of
any transmitter component (crystal, semiconductor, etc.) not
authorized by the local government radio management
departments equipment authorization for this radio could
violate the rules.
FCC Requirements:
This device complies with part 15 of the FCC Rules.
Operation is subject to the condition that this device does
not cause harmful interference. (Licensed radios are
applicable); This device complies with part 15 of the FCC
Rules. Operation is subject to the following two conditions:
(Other devices are applicable)
(1) This device may not cause harmful interference, and
(2) this device must accept any interference received,
including interference that may cause undesired operation.
NOTE: This equipment has been tested and found to
comply with the limits for a Class A digital device, pursuant
to part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference
when the equipment is operated in a commercial
environment. This equipment generates, uses, and can
radiate radio frequency
energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a
residential area is likely to cause harmful interference in
which case the user will be required to correct the
interference at his own expense.
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