M33

MilPro Headset
Tactical Communication & Hearing Protection
User instructions
 QUICK GUIDE:
Fig 1
Push

+ -
1. 2. 3. 4.

Fig 2 “Power on/off” Fig 3

Fig 4 “Menu”

1. 2. 3.
Fig 5 From Power On Mode Fig 6 From Power On Mode

“Ear Plug Mode” “Ambient listening Mode”

“Power on” “Power off”

Double Click Click “+“ or “-“

1
Fig7 Conncet PTT

Fig8
Adjustment to Standard Ambient Listening Mode
Ambient
Listening Mode Silent Ambient Listening Mode

Balance Center
Left 1
Adjustment Left 2
to Volume Left Max
Right Max
Audio Menu Right 2
Right 1

Warning Signals On
Switch to Warning
Signal
Off

Automatic Power-off On
Switch to Automatic
Power-off
Off

Restore Factory Settings

Restore Factory
Settings Restore Factory Settings Completed

2
 Congratulations and thanks for your choosing EARMOR®
EARMOR® Hearing Protectors designed to protect users from harmful noise.

①
2. OVERVIEW

⑨
④
1.
2.
Headband
Bracket
③ ⑤ ⑦ ⑥ ⑧
3. Pickup Microphone
4. Battery Holder
5. Volume up
6. Volume Down
7. Bluetooth® Button
8. PTT Port
9. Boom Mic S10D
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3. APPROVALS
EARMOR® M33 Milpro Headset are tested and certified according to the follow-ing standards:
ANSI S3.19-1974
EN 352-1: 2020
EN 352-4: 2020
EN 352-6: 2020
EN 352-8: 2020

3.1 Noise Reduction Rating: 23 dB

EARMOR® M33 Milpro Headset Attenuation data, American National Standards Institute
specifications: ANSI S3.19-1974

TEST FREQ.(HZ) 125 250 500 1000 2000 3150 4000 6300 8000 NRR
MEAN
ATTENUATION(DB) 17.1 18.8 26.8 34.0 32.4 36.6 42.2 43.5 43.0
STANDARD
23
DEVEATION(DB) 2.2 2.3 2.6 4.2 2.4 3.3 4.2 3.9 4.5

3.2 Single Nmber Rating: 29dB

EARMOR® M33 Milpro Headset Appendix A Attenuation DataIndividual and Summary Attenuation
Data for Hearing Protective Devices
EN 352-1: 2020

SUBJECT 63 125 250 500 1000 2000 4000 8000 SNR

MEANS 17.7 13.9 20 27 32.6 32.3 42.4 42.8

STD.DEV 2.2 2.1 3 2.9 3.8 2.5 4.0 4.1 29

MEAN-SD 15.4 11.8 17.0 24.1 28.8 29.7 38.4 38.8

SNRm=30.8
SNRs=2.0
SNR(dB)=29

H84(dB)= 32dB Hm= 34.8 Hs= 2.5

M84(dB)= 26dB Mm= 28.5 Ms= 2.2
L84(dB)= 19dB L =
m
21.1 L=
s
2.1

4. DESCRIPTION
Your hearing and enhance situational awareness and communication in noisy environments. With
advanced and multifunctional features, it is suitable for a variety of missions. The voice menu
allows you to select the functions you need with ease. Additionally, the U174 downlead cables can
be removed to connect to a NATO standard PTT for command and communication.
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 5. INFORMATIONS
For the best protection, ear cushion sealing ring should seal firmly against head, Anything that
interferes with the seal --- such as long hair(pull back to the extent possible), thick or poorly
fitting eyeglass temples, pencils or caps will lessen the protection.

- Earmuffs must be regularly inspected for cracks or worm parts and replaced as needed.
Typical life for foam cushion sealing rings is 12 months.
- Clean the exterior of the hearing protector regularly with soap and warm water. Do not
immerse the whole headset in water.
- Do not store the hearing protector behind a windshield or at temperatures above 131°F(55°C).
- Certain chemical substances may damage this product. Contact the manufacturer for more
information.
- The product is suitable for transport in original packaging.
- The earmuffs passes small, meduim and large size ranges, compliant to EN 352-1:2020.

6. CAUTION
If instructions are not followed, bodily injury may result or protection may be severely These
hearing protectors help reduce exposure to hazardous noise and other loud sounds. Misuse
or failure to wear hearing protectors at all times when you are exposed to noise may result in
hearing loss or injury.
If there is any drainage from your ear or if you have an ear infection, consult with your physician
before wearing hearing protection. Failure to do so may result in hearing loss or injury.
For proper use, see user instructions or contact EARMOR® customer service Email:
cs@earmor.com

7. TO REDUCE THE SAFETY RISK WHEN USING THE PRODUCT

• Only use the specified type of battery provided by OPSMEN.
• If the headset is not to be used for a long time, please remove the batteries to prevent leakage
that may damage the headset or cause personal injury.
• If the microphone or any accessory is damaged or malfunctioning, please cease usage
immediately.
• Contact OPSMEN official after-sales mailbox cs@earmor.com for maintenance service.

8. OPERATING INSTRUCTIONS

“+“Button “-“Button

Changing And Replacing The Batteries (Fig 1)

1-2. Ensure the polarity of the batteries aligns with the indicators inside the battery compart
ment, then pro ceed to insert the batteries (2xAAA).
3-4. Open the battery compartment lid, press the electrode tab with your finger, and by tilting
the headset, the batteries can be easily removed.
* The lids must be pressed all the way down to ensure good seal. Low battery level is
indicated by avoice message “low battery”, repeatedly.
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 Turn On And Off The Headphones (Fig 2)
Press and hold the [+] or [-] button for 3 seconds until the “power on” audio prompt is heard. If
the “power off” audio prompt is heard, the device has been powered off.

The headset will emit a warning sound: “auto shut off after 3 minute” after 3 hours and 57
minutes of inactivity. This is a warning that the headset will automatically power off after four
hours of inactivity.

The Volume Can Be Adjusted In Five Levels. (Fig 3)

The device has 5 pickup volume levels. Level 5 is max and level 1 is mute. Level 3 is default after
reset or re-pairing.
Press [+] to increase volume. “Dudu” prompt means max volume reached.
Press [-] to decrease volume. “Ambient Listening off” prompt means device muted.

Entering the Menu (Fig 4)

1. Press and hold the [+] and [-] buttons to enter the menu. A voice will confirm.
2. Press the [-] button briefly to toggle through the menu. The menu steps are listed below.
3. Use the [+] button to change the setting and, if applicable, toggle through the available set
tings. A voice message confirms each step, followed by the current setting. Changes are also
confirmed by a voice message. After a few seconds of no activity, the menu re turns to volume
mode. By pressing [+] and [-], the volume setting can be instantly reached at any stage of the
menu.

Entering ear-plug mode (Fig 5, Fig 6)

Fig5: Double-click [+] to enter earplug mode.
Fig6: Click on the [+] or [-] to directly exit the earplug mode.
*No audio prompts in Bluetooth® mode.Device reverts to normal mode when powered off.

PTT wire connection(Fig 7)

To connect, firmly insert the connector into the receptaclelocated on the bottom of the left earcup
until you feel/hear a click.
Your hearing and enhance situational awareness and communication in noisy environments. With
advanced and multifunctional features, it is suitable for a variety of missions. The voice menu
allows you to select the functions you need with ease. Additionally, the U174 downlead cables can
be removed to connect to a NATO standard PTT for command and communication.

EN 352 SAFETY INFORMATION:

• The output of the level-dependent circuit of the hearing protector may exceed the ex ternal
sound level.
• Installing the sanitary cover on the cushion may affect the acoustic performance of the
earmuffs.
• Performance will decrease with battery consumption. The expected continuous use time of the
battery is approximately 50 hours.
• Maybe adversely affected by certain chemical substances. More information can be get from
the manufacturer.

This product contains electrical and electronic components and must not be disposed of
using standard garbage collection. Please consult your local electrical and electronic
equip ment disposal instructions.
6
 TO REDUCE THE RISKS ASSOCIATED WITH HARMFUL NOISE
• Listening to music or audio communication may reduce situational awareness and the ability to
hear warning signals. Stay alert and adjust the volume to the lowest accept able level.
• Use and maintain the hearing protector properly. Check the hearing protector before each use.
If it is damaged, please choose an undamaged hearing protector or avoid a noisy environment.
• Do not bend or reshape the headband, and ensure that there is enough clamping force to fix
the earmuffs.
• Earmuffs must be regularly inspected for cracks and leaks to be worn properly, replaced as
needed.
• The output of the electronic audio circuit of this hearing protector may exceed the daily limit
sound level. Please adjust the audio volume to the lowest acceptable level

BLUETOOTH® OPERATION
1. Connect to Bluetooth®
A. Turn ON / OFF Bluetooth® mode:
Press and hold the button for 2 seconds.

Prompt tone: BT mode / Ambient listening Mode BT Button

B. Bluetooth® pairing:
Establish a Bluetooth® connection between the device and the earphones. The device
automatically reconnects when Bluetooth® is turned on.
*Reconnect failure: The earphones enter Bluetooth® mode, but the device cannot auto
matically reconnect. After 10 seconds, pairing will start automatically.

Prompt tone: Connected

C. Force pairing mode:

Press and hold the “ button” for 5’s

Automatic shutdown of Bluetooth® mode: If not connected to a device for 5 minutes.

2. Play Music/Answer A Call

To listen to music or make a call, the Bluetooth® device must first be regis tered (paired).

Setting Operation
Play music Click the “BT button”.
Pause music Click the “BT button”.
Answer a call Click the “BT button”.
Reject a call Press and hold for 2’s
Hang up a call Click the “BT button”.

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FCC WARNING
This device complies with part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) this device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.
Any changes or modifications not expressly approved by the party responsible for compliance
could void the user’s authority to operate the equipment.

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation.

If this equipment does cause harmful interference to radio or television reception,

which can be determined by turning the equipment off and on, the user is encouraged to try to
correct the interference by one or more of the following measures:

-- Reorient or relocate the receiving antenna.

-- Increase the separation between the equipment and receiver.
-- Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
-- Consult the dealer or an experienced radio/TV technician for help. The device has been evalu
ated to meet general RF exposure statement.

The device can be used in portable exposure condition without restriction

FCC ID:2A4IK-M33

SPECIFICATIONS:
Life time: 50 hours
Battery capacity: 2AAA
Talk time (1kHz, 50% volume): 50 Hours
Operating temperature: -40°C~65°C
Storage temperature (full set): -50°C~70°C
Net weight: 320±10
Net weight with microphone: 335±10

AUDIO INPUT LEVEL

The audio level in the hearing protector is dependent on the audio input level.To prevent harmful
noise levels, the hearing protector audio levels is limited to 82dB when connected to a Personal
Music Player (PMP). If the hearing protector is connected to a PMP or other device with very high
output level ,it is the user’s responsibility to set the audio input level to a safe level.
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 M33 Milpro Headset adapter Installation Guide

STEP.1.
1. As shown in Figure 1, unplug the microphone.

Unplug

2. Select either side of the earmuff to disassemble (the right side is demonstrated in the image).
As shown in Figure 1, place your finger into the space between the earmuff ring (Part A) and the
cotton pad (Part B), and exert force in the direction of the arrow to detach the earmuff (Part C)
from the earmuff ring.

*During the entire replacement process, please wear gloves to avoid accidental cuts from some
sharp components.

C B A

9
3. As shown in the picture, gently remove the single positioning buckle (Part D) in Part C in the direc
tion of the arrow, and place it in a safe location to avoid loss. In step 2, continue to remove the
bracket pivot (Part E) in the direction of the arrow, and place it in a safe location to avoid loss.

D E
3
3

2 2

2 1 1 2

4.1. When switching from the standard M33 adapter to the M11 adapter , follow these steps to disas
semble the microphone: Firstly, remove the caps on both sides of the apapter and disconnect the
microphone plug. Then, manually rotate the left microphone apater (component G) to balance,
separate the bracket, and place it in a safe location.

EF

10
 4.2. To switch from the standard M33 adapter to the M18 adapter, follow these steps for microphone
disassembly: First, rotate the left microphone bracket to the balance posi- tion, allowing it to
separate from the headphone bracket. Next, rotate the cap at the top of the headphone bracket to
disconnect the arm. Finally, place the microphone parts in a secure location.

11
STEP.2. Assembly

M33 Milpro Headset M18 Adapter Installation Guide

1. Firstly, rotate the adapter leg at the microphone end of the headband adapter to its limit and
remove it. Unscrew the cap of the adapter leg, then rotate the microphone arm to its limit and
remove it. Next, align the separate tenon part from the M18 adapter package with the microphone
arm limit, and rotate it to the extreme position. Extract the two M18 helmet adapters from the
accessories, align the adapter slot with the earmuff slot in the direction shown in Figure 6, and
gently push the adapter into the slot.

2. Insert the adapter pivot (Part E) respectively, and install the positioning buckle (Part D). Also,
please pay attention to the wire position connecting the earmuffs on both sides.

3. Install the microphone. Take component H, which was removed during disassembly, and install it
onto the M18 adapter as shown in the figure.

D E
12
 4. Align the corresponding cotton pads (Part B) and earmuff rings (Part A) with the earmuffs, press
and install until they fit closely to the earmuffs.

B
A

5. Replacement complete.

13
M33 Milpro Headset M11 Bracket Replacement and Adaptor
Installation Guide
1. Remove two M11 helmet adapters from the included accessories. Following the direction indicated
in the picture, insert each adapter into the adapter axle.

EF
2. Continue with the installation of the positioning buckle. At the same time, pay attention to the
location of the electrical wires connecting the two ear muffs.

1 1

2 2

2 3 3 2

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 3. Align the corresponding cotton pads (Part B) and earmuff rings (Part A) with the earmuffs, press
and install until they fit closely to the earmuffs.

B
A
4. Replacement complete.

15
M33 N Series Assembly And Replacement Guide

1. Adjust both ends of the load-bearing strap as shown in the figure;

1 2 4
2

1
2

2. Fix both ends of the load-bearing 3. As shown in the figure, please adjust the length of
strap on the hook-and-loop fasten both ends of the load-bearing strap for comfort
er of the headphone shell as when wearing;
shown in the figure; (Note: It must
not cover the pickup microphone)

16
 4. As shown in the figure, please note that the communication wire should be placed on the inner
side of the bracket when connecting the PTT.

*The N series is equipped with a rear-neck style bracket and a lightweight adjustable load-bearing
strap. It can adapt to various head accessories or protective gear. For different usage styles,
please refer to the following instructions:

5. When used with a duckbill cap or similar cap, please wear the cap securely first, and then wear the
assembled M series headphones.
(Note: The headphones need to be worn with the load-bearing strap above the cap)

M33N Series Assembly and Replacement

When used with a helmet without accessory slots, please follow the steps below:
Separate the load-bearing strap from the headphones and place it on the inner side of the helmet
as shown in Figure 1;
Wear the helmet (as shown in Figure 2, expose both ends of the load-bearing strap);
Wear the headphones, fix the headphones on the head and then fix both sides of the Velcro part
with the headphones (as shown in Figure 3).

17
 1 2 3

M18 Adapter Wearing Instructions:

1. Distinguish between the left and right sides of the headphones, and install the bracket base
(with the wire slot facing down) on the ARC rear rail, respectively. You can adjust the base to a
suitable position using the rail buckle.
2. Simultaneously adjust the headphone connection wires in the wire slots on both sides to make
the headphone connection wires fit closely to the helmet.

1 2

3. Open the closed joint (1), rotate the headphones to the ear position, and then close the
headphones inward.

4. Adjust the length of the bracket [1] to a suitable position and coordinate with the universal axis
to ensure the headphones fully fit the head.

3 4
1

2
1

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 WARRANTY
EARMOR® M33 Milpro Headset is warranted to be free of defects in material and workmanship
for a period of 1 year from the date of original purchase.

The warranty is nullified in all of the following situations:

1. The product(s) is/are broken down, reconstructed and/or modified by unauthorized
parties.
2. The product(s) is/are damaged through improper use.
3. The product(s) is/are damaged by leakage of batteries.

CE COMPLIANCE STATEMENT:
We, EARMOR®, declare under our sole responsibility that the EARMOR® Headset complies with
the essential requirements and provisions of the applicable European Union (EU) Directives and
harmonized standards.
The product has been tested and approved in accordance with

EN 352-1:2020, EN 352-4:2020, EN 352-6:2020, EN 352-8:2020.

Unwearing Instructions:

1.Open the closed joint.

2.Rotate the headphones to the back of the helmet.
3.Close the headphones inward so that they fit closely to the helmet.

CONTACT
For the latest information on EARMOR® products and services
Please contact a local distributor or email: info@earmor.com / cs@earmor.com
EARMOR® official website http://earmor.com/ shall prevail in case of any product data changes.

EN352
Mandatory conformity marking.
CE mark below by Notified Body Number,The various
components of the CE marking must have the same vertical
dimension, and may not be smaller than 5 mm.
02/2023
M33 Model Name/Number. Item:M33

EN 352 EN 352, Hearing protectors - General requirements

Manufacturer’s logo

02/2023 date of manufacture ANSI

S3.19-1974
OPSMEN® Tech Co., Ltd.
Tel: +86 20 81179170
Fax: +86 20 81179171
E-mail: info@earmor.com / cs@earmor.com
Add: Room 601, Building A, No.94 Liwan Road, Liwan District, Guangzhou , Guangdong Province, China
19