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KNoW YouR HEADPHoNEs
See Figure 1, page 10.
The safe use of this product requires an understanding of
the information on the product and in this operator's man-
ual. Before use of this product, familiarize yourself with all
operating features and safety rules.
NoTE: The earphone with the battery compartment will be
referred to as the LEFT side. The earphone with the volume
control will be referred to as the RIGHT side.
ADJusTABLE PADDED HEADBAND
The adjustable headband is flexible and padded for opera-
tor comfort.
AuTo PoWER-oFF
Your microphone will automatically shut off after 4 hours.
1/8 in. AuXILIARY INPuT JACK AND CABLE
Allows you to listen to MP3 and similar sound devices.
PRoDuCT sPECIFICATIoNs
Voltage .......................................................................4V DC
ATTENuATIoN DATA
Freq. Hz
125
Mean
16.0
std. Dev.
3.5
The NRR calculated from these laboratory-based attenu-
ation data is 25. Improper fit of this device will reduce its
effectiveness in attenuating noise. Consult instructions for
use for proper fit.
The level of noise entering a person's ears when a hearing
protector is worn as directed is closely approximated by
the difference between the A-weighted environmental noise
level and the NRR.
EXAMPLE:
1. The environmental noise level as measured at the ear
is 92 dBA.
2. The NRR is 25 decibels (dB).
3. The level of noise entering the ear is approximately
equal to 67 dBA.
NOTICE: For noise environments dominated by frequencies
below 500 Hz, the C-weighted environmental noise level
should be used.
Earmuffs must be worn at all times in noisy surroundings
for proper protection.
250
500
1000
21.4
25.7
35.7
3.5
2.4
3.7
FEATuREs
LoW PoWER CoNsuMPTIoN
Your headphones feature low energy requirements during
normal use for extended operation.
MICRoPHoNEs
The microphones allow you to hear your voice as well as
background noise. They are controlled with the volume knob
on the right earphone.
NoIsE suPPREssIoN
Electronic noise suppression allows for normal human
conversation while limiting the environment noise.
quICK REsPoNsE CIRCuITRY
Helps reduce impulse noise such as gun shots and
hammer blows.
oN/oFF/VoLuME KNoB
The on/off/volume knob, located on the right earphone,
controls the microphone level and ambient noise being
transmitted through the earcups. It also turns the power
on and off.
2000
3150
32.0
39.9
3.0
3.0
Although hearing protec-
tors can be recommended
for protection against the
harmful effects of impulsive
noise, the noise reduction
rating (NRR) is based on
the attenuation of continu-
ous noise and may not be
an accurate indicator of the
protection attainable against
impulsive noise such as gunfire. (Wording required by EPA).
The EPA has selected the NRR as the measure of a hearing
protector's noise reducing capabilities. Aearo Technologies
makes no warranties as to the suitability of the NRR as a
measure of actual workplace protection since such protec-
tion is highly dependent on user training, motivation, and
utilization. A better estimate of workplace protection can be
obtained by derating the labeled NRR of this, or any other
hearing protector, by 50%.
6
4000
6300
8000
40.7
36.0
34.0
3.3
4.4
6.1
ANsI s3.19-1974
NRR CSA Class
25
A
V45100
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