©2015 Bose Corporation, The Mountain,
Framingham, MA 01701-9168 USA
AM746707 Rev. 00
e operation switches
The operation switches are located inside the battery compartment.
Operation Switch Purpose
PRIORITY
(Available for
Bluetooth
headsets)
Establishes priority between two secondary audio sources. Select BT
to give the Bluetooth (wireless) connection higher priority. Select AUX to
give the wired connection higher priority.
See “Setting the Priority (BT-AUX) switch” on page 25 in the owner’s
guide.
INTERCOM
(Available for head-
set configurations
that support two-
channel or stereo
intercom systems)
For most configurations, set at the factory for mono audio systems (to
provide audio in both ears).
Set it to stereo (ST) if your aircraft has a stereo intercom.
AUTO ON
(Available for
aircraft powered
headset versions)
Set at the factory to enable the Auto On function. The headset will turn
on when aircraft power is available.
To disable Auto On, set the switch to OFF. With the switch in OFF
position, the user must manually turn the headset on.
AUTO OFF Set at the factory to enable the Auto Off function. The headset will turn
off after three to nine minutes of inactivity.
To disable Auto Off, set the switch to OFF. With the switch in OFF
position, the user must manually turn the headset off.
Pairing the headset with a Bluetooth®device
1. Press to turn on the headset. Make sure the Secondary Audio Mode selector is in the MUTE or
MIX position (not in the OFF position).
The power indicator glows green or yellow, depending on the charge level of the battery. (If the light is
red, the battery is low and needs replacing.)
Note: The first time you turn on the headset, it will automatically go into pairing mode and the
Bluetooth indicator will flash purple. This will only happen the first time you turn on the headset.
2. Locate the Bluetooth menu on your device and make sure the Bluetooth feature is ON.
Select Bose A20 from the Bluetooth device list.
Bose A20
Bluetooth indicator
Bluetooth
multi-function
button
The Bluetooth indicator flashes purple when the headset is in pairing mode, and flashes blue when the
devices are connecting.
To pair another device, press and hold for one second to put the headset into pairing mode.
Then repeat the steps above.
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are property of Bose Corporation.
©2015 Bose Corporation. No part of this work may be reproduced, modied, distributed, or otherwise used without prior written permission.
