Sharp AL-1650 - Manual (Page 65)

WARNING:
FCC Regulations state that any unauthorized changes or modifications to
this equipment not expressly approved by the manufacturer could void the
user's authority to operate this equipment.
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 gen-
erates, uses, and can radiate radio frequency energy and, if not installed and
used in accordance with the operation manual, may cause harmful interfer-
ence 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.