Bose A20 Headphones User Manual


 
16
Tab 3, 11
Tab 8, 16 Tab 7, 15 Tab 6, 14 Tab 5, 13 Tab 4, 12
EnglishTab2, 10
USING THE HEADSET
Double-click the power button to dim the power and Bluetooth
®
wireless
technology indicators. To toggle the indicators between dim and bright,
rapidly press the power button twice.
Volume control
The left and right volume control wheels on the control module adjust the
volume of the corresponding earcup. With Acoustic Noise Cancelling
®
off,
volume control will be set to the maximum level.
CAUTION: Avoid setting the volume levels too high. Exposure to loud sounds may
cause hearing damage.
Holding the control module upright and facing you:
Use the left wheel to adjust volume of the left earcup.
Use the right wheel to adjust volume of the right earcup.
Overall headset volume control requires adjustments at both the aircraft
intercom or radio and at the headset control module. Even at its lowest setting,
neither volume control wheel can completely turn off the volume.
Power indicator
New alkaline AA batteries will generally supply at least 45 hours of power for
the headset. Battery life varies with the ambient noise level of the aircraft,
temperature, ear cushion condition, use of the Bluetooth feature, and age of
the batteries. The power indicator changes color to indicate the power status,
as follows:
Note: Replace batteries with alkaline batteries only. Do not use any other battery
chemistries.
*
Bluetooth wireless technology is disabled to conserve the remaining power once the battery
reaches this level.
Indicator color Power source Type of light Indicates
Green Aircraft Slow flashing Power ON
Green Battery Flashing Power ON and batteries good
Amber Battery Fast flashing Power ON, but batteries low
(8 hours or less remaining)
Red Battery Faster flashing Power ON, but batteries very low
*
(2 hours or less remaining)
Off None None Power OFF or batteries depleted
00_Cavu.book Page 16 Wednesday, April 25, 2012 10:10 AM