User Manual
i
Tab 3, 11
Tab 8, 16 Tab 7, 15 Tab 6, 14 Tab 5, 13 Tab 4, 12
EnglishTab2, 10
SAFETY INFORMATION
NOTE: This equipment has been tested and
found to comply with the limits for a Class B
digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to
provide reasonable protection against
harmful interference in a residential
installation. This equipment generates, uses
and can radiate radio frequency energy and,
if not installed and used in accordance with
the instructions, may cause harmful
interference to radio communications.
However, there is no guarantee that
interference will not occur in a particular
installation. If this equipment does cause
harmful interference to radio or television
reception, which can be determined by
turning the equipment off and on, the user is
encouraged to try to correct the interference
by one or more of the following measures:
– Reorient or relocate the receiving antenna.
– Increase the separation between the
equipment and receiver.
– Connect the equipment into an outlet on a
circuit different from that to which the
receiver is connected.
– Consult the dealer or an experienced
radio/TV technician for help.
Changes or modifications not expressly
approved by Bose Corporation could void
the user's authority to operate this
equipment.
Operation is subject to the following two
conditions: (1) This device may not cause
harmful interference, and (2) this device
must accept any interference received,
including interference that may cause
undesired operation.
Bose Corporation hereby declares
that this product is in compliance
with the essential requirements
and other relevant provisions of
Directive 1999/5/EC and other
applicable Directives. The
complete Declaration of
Conformity can be found at
www.Bose.com/compliance.
COFETEL CFT/D03/USI/DGB/xxxx/xx
Operate this product within the temperature
range of 5°F to 131°F (-15°C to 55°C) only.
Important Safety Instructions
• Please read these instructions carefully
and completely before using the headset
• Make these instructions easily accessible
to all users at all times. Always include
these instructions when passing the
headset on to third parties.
• During flight operations, do not use the
headset for telephone calls.
• It is the responsibility of each aircraft
operator or pilot in command to
determine that any and all portable
devices will be free of any interference
with the navigation or communication
system of the aircraft. In addition, it is
their responsibility to determine the
suitability of the performance of portable
devices in relation to the use of the Bose
A20 Headset.
• The headset is capable of producing
sound pressure levels exceeding
85dB(A). In many countries 85dB(A) is
the maximum legally permissible level for
continuous noise exposure during the
working day. Exposure to sounds of
higher volume levels or longrt durations
can permanently damage your hearing.
• Never repair or attempt to repair a
defective headset yourself. Contact your
Bose Aviation Headset Department.
Refer to “Contact information” on
page 37
• Do not immerse the headphones in water
or any other liquid. See “Cleaning the
headset” on page 23 for cleaning
instructions.
• Warning:
Choking hazard,
Keep the
batteries away
from children.
• Danger of explosion if battery is
incorrectly replaced. Replace only with
the same type. Battery may cause a fire
or chemical burn if mishandled. Do not
recharge, disassemble, heat or
incinerate. Dispose of used battery
properly.










