E.F. Johnson Company 53SL ES Series Operating Manual page 21

Safety Information
Electromagnetic Interference
This device complies with Part 15 of the FCC Rules. Operation is subject to the condition
that this device does not cause harmful interference. In addition, changes or modification
to this equipment not expressly approved by EF Johnson Technologies could void the
user's authority to operate this equipment (FCC Rules, 47CFR Part 15.19).
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."
53SL ES Series Mobile Radio Operating Manual April 2009 xvii