Bose
®
A20
®
Aviation Headset
Quick Reference Guide
Please read the Important Safety Instructions enclosed in the carton.
Bluetooth
®
control module Conventional control module
Left/Right
Intercom Volume controls
Power indicator
Power button
Bluetooth
Volume Up button
Auxiliary (AUX)
audio input
Bluetooth
Volume Down button
Bluetooth
indicator
Bluetooth
multi-function
button
Secondary Audio
Mode selector:
Mute
Intercom
prioritized over
secondary
sources
Mix
Intercom
mixed with
secondary
source(s)
Off
Intercom only
Mute
Intercom
prioritized over
secondary
sources
Mix
Intercom
mixed with
secondary
source(s)
Off
Intercom only
Secondary Audio
Mode selector:
Installing the batteries
1. Press down firmly on the finger indent and slide the battery cover down. The cover is tethered to the
module. Do not attempt to detach it.
2. Insert two alkaline AA batteries into the control module, observing proper polarity.
Warning: Replace batteries with alkaline batteries only. Do not use any other battery chemistries.
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