USING YOUR HEADSET
Holding the control module upright and facing you:
•Use the left knob to adjust volume in the left earcup.
•Use the right knob to adjust volume in the right earcup.
Controlling the volume of a single battery powered headset
With ANR on:
1.Set the aircraft communication system to a safe operating level.
2.Turn each volume knob on the headset control module down to decrease, or up to increase the volume of the earcup it controls.
Volume control using multiple headsets
When an aircraft has more than one headset connected to its audio system, the pilot in command should adjust the volume of his/her Bose® Aviation Headset 
as follows:
1.Turn off ANR by setting the power switch to OFF.
2.Turn each volume knob on the headset control module up to its maximum setting.
3.Adjust the master volume on your aircraft intercom or radio until you can hear communications clearly.
Note: This should be done in a noisy environment.
4.Adjust the volume knobs on the headset control module to balance the volume between the left and right earcups.
5.Turn ANR back ON.
6.Turn down the aircraft intercom or radio master volume to the level you prefer.
After the pilot’s headset volume is set, passengers may adjust the volume of their headsets. Have them follow steps 1 and 2 under See “Controlling the volume of a single aircraft powered headset” on page 24.
Battery power indicator
New alkaline AA batteries (IEC LR6) will generally supply 30 to 40 hours of power for the headset. Battery life varies with the ambient noise level of the aircraft, temperature, ear cushion condition, and age of the batteries.
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