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Volume level
NOTE: Volume controls only change the level of the environmental microphones. Radio volume
is controlled by the radio volume control.
Press the forward button (A:10) to increase the volume and the rear button to decrease the
volume. To turn the volume off, press either of the Power/Volume buttons for three seconds.
Menu Functions
1. Volume Boost Mode
Press and hold the forward button for 10 seconds; headset will restart at higher gain.
2. Balance Mode
Press both forward and rear buttons together for 10 seconds to adjust balance between
left and right ear using the forward and rear buttons.
3. EQ Mode
Press the rear button for 10 seconds to adjust the frequency range of the environmental
microphones using the forward and rear buttons.
4. Active Volume Troubleshooting
If the audio is weak or the system fails to activate ensure that the volume control is
properly adjusted and the batteries have not lost power.
CLEANING AND MAINTENANCE
Use a cloth wetted with soap and warm water to clean the outer shells, headband and ear
cushions. Do not clean with solvents such as alcohol or acetone, or with waterless hand
cleaners or products containing lanolin.
NOTE: Do NOT immerse the hearing protector in water.
If the hearing protector gets wet from rain or sweat, turn the earmuffs outwards, remove the
ear cushions and foam liners, and allow to dry before reassembly. The ear cushions and foam
liners may deteriorate with use and should be examined at regular intervals for cracking and
other damage. When used regularly, 3M recommends replacing the foam liners and ear cush-
ions at least twice a year to maintain consistent attenuation, hygiene, and comfort. If an ear
cushion is damaged, it should be replaced. See Headset Spare Parts and Accessories below.
REMOVING AND REPLACING THE EAR CUSHIONS
1. To remove the ear cushion, slide your fingers under the inside edge of the ear cushion
and firmly pull straight out. (F:1)
2. Replace the foam liners. (F:2)
3. Fit one side of the ear cushion into the groove of the earcup and then press on the
opposite side until ear cushion snaps in place. (F:3)
Fig. F
F:1
F:2
9
F:3
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