Use Instructions

ManualsBrandsBOYA ManualsAudio Equipment2.4G wireless microphone

Thank you for purchasing BOYA BY-WM4 PRO system!

Designed for videographers on a limited budgetand

video hobbyists, BY-WM4 PRO is a new generation

2.4GHz wireless microphone system, dual-Channel

for capturing audio with dual subjects to your

smartphones, tablets, DSLR cameras, consumer

camcorders, PCs etc.

The BY-WM4 PRO system is suitable for a wide range

of wireless applications such as interviews, mobile

journalisms, reporting, vloggings, podcasts and more.

The BY-WM4 PRO system is a expandable evolution

system that allows the user to mix and match

different kinds of receivers while using with the

TX4 Pro transmitter.

Please don’t touch here during using, otherwise, it

will effect signal.

Please don’t touch here during using, otherwise, it

will effect signal.

7. Battery compartment

Accommodates two pieces of AAA batteries.

For more details, please see “Installing batteries”

on page 11.

For more details, please see “Installing or

uninstalling clip” on page 15.

8. Clip

1. Earphone Jack

Instruction Manual

(3.5mm diameter stereo mini jack)

To monitor the receiver output, connect the

headphones to this connector.

NOTE：

Do not connect headphones with a monaural mini jack.

This may lead to short-circuiting of the headphone

output, resulting in distorted sound output.

NOTE：

Do not connect headphones with a monaural mini jack.

This may lead to short-circuiting of the headphone

output, resulting in distorted sound output.

NOTE：

Do not connect headphones with a monaural mini jack.

This may lead to short-circuiting of the headphone

output, resulting in distorted sound output.

NOTE：

1) Please adjust the monitoring audio volume of RXD

before recording.

NOTE：

1) Please adjust the monitoring audio volume of RXU

before recording.

2. LINE OUT (audio output) Jack

- For cameras, camcorders, audio recorders and

other audio/Video recording devices.

Connect one end of the supplied TRS stereo 3.5mm

mini output cable here, and the other end to camera.

3. Power LED

For more details, please see “Power LED” on page 7.

4. Power OFF/ON

Press these buttons to set the attenuation level of

the input signal.

6. Antenna

7. Battery compartment

Accommodates two pieces of AAA batteries.

For more details, please see “Installing batteries”

on page 11.

8. Clip

For more details, please see “Installing or

uninstalling clip” on page 15.

9.Shoe mount adapter

Connecting the transmitter and the ReceiverSet Up Guide

Set Up Guide Connecting the transmitter and the Receiver

①

②

③

④

⑧

⑤

⑥

⑦

①

②

③

④

⑤

⑥

⑦

②

①

③

④

⑤

⑥

⑦

⑧

What’s difference?

MICROPHONE

SMARTPHONE

How to use it

Installing batteries

1. Both transmitter and receiver requires two AAA size

batteries.

2. Slide and remove the transmitter’s battery

compartment cover.

3. Insert two pieces of batteries.

4. Close the battery compartment cover.

5. Do the same ways as step 2 to 4 to insert battery

into receiver.

Connecting the transmitter and receiver

Using the microphone with smartphone, tablet,

Mac or laptop with combo headphone/Mic jack.

Receiver

Using the microphone with cameras, camcorders,

audio recorders and other audio/video recording

devices.

How to connect transmitter and receiver?

Receiver

Receiver (RX4 Pro)

3.5 mm TRS connector

- For cameras, camcorders, audio recorders and

other audio/video recording devices.

3.5 mm TRRS connector

- For Smartphone, tablet, Mac or laptop with

combo headphone/Mic jack

Connect to

Receiver “LINE OUT”

Connect to Smartphone

1 2 3 6 7 84 5 9 10 11

12 13 14 15 16 17 18 19 20 21 22 23

24 25 26 27 28 29 30 31 32 33

- For using smartphone, tablet or Mac

Connect one end (90° plug) of the supplied

TRRS stereo 3.5mm mini output cable here, and

the other end (straight plug) to smartphone.

5. Volume +/-

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②

③

④

⑤

⑥

⑦

BY-WM4 Pro consists of one body-pack

transmitter(TX4 Pro), a portable receiver

(RX4 Pro), and their accessories as

following:

Transmitter(TX4 Pro) Receiver(RX4 Pro)

Lavalier/lapel microphone 3.5mm to TRS audio output cable

3.5mm to TRRS audio output cable

1. Microphone input

- Connect the supplied lavalier microphone here.

- Fully insert the microphone’s 3.5mm plug and

make sure it clicks into place.

1. Plug the BY-WM4 RXD directly into the lightning port

of smartphone.

2. Open the audio/video app on mobile device, then

the indicator of receiver should be light up.

3. The Power LED flashes slowly waiting for connecting

with the transmitter.

1.Turn on the transmitter and plug the receiver

into smartphone.

2. Long press the pair bottom of receiver with pair

pin, the indicator of receiver will flash quickly

when entering paring mode.

Before leaving factory, the connection of transmitters

and receiver will be established.

If transmitters and receiver disconnect, please follow

below steps:

3.Long press the pair button on the side of the

transmitter entering the pairing mode.

4.When the transmitter and receiver connected, the

light of receiver stays blue, and transmitter flashes

every 2.5 seconds.

Otherwise, the light of receiver and transmitter will

flash continually every 1 second, then try 1-3 steps

again.

1.Turn on the transmitter and plug the receiver

into smartphone.

2. Long press the pair bottom of receiver with pair

pin, the indicator of receiver will flash quickly

when entering paring mode.

Before leaving factory, the connection of transmitters

and receiver will be established.

If transmitters and receiver disconnect, please follow

below steps:

3.Long press the pair button on the side of the

transmitter entering the pairing mode.

4.When the transmitter and receiver connected, the

light of receiver stays blue, and transmitter flashes

every 2.5 seconds.

Otherwise, the light of receiver and transmitter will

flash continually every 1 second, then try 1-3 steps

again.

Press these buttons to set the attenuation level

of the input signal.

For more details, please see “Connecting the

transmitter and the receiver” on page 21.

2. Line In

3. Power LED

1) The power LED flash blue when the unit is on.

2) The power LED glows red when low power.

For more details about LED indicator, please refer to

as following:

Status Receiver Transmitter

Stays blue

Flashes continually

every 1 second.

Flashes in blue

Flashes in redLow power

Off

Flashes in blueOff

Flashes continually

every 2.5 seconds.

The transmitter and the receiver connects.

The transmitter and the receiver disconnects.

Receiver unit is turned OFF(Transmitter is still ON)

Transmitter unit is turned OFF(Receiver is still ON)

Flashes continually

every 1 second.

For more details about LED indicator, please refer to

as following:

Status Receiver Transmitter

The indicator

won't light up

until you turn on

the audio/video

app.

Flashes continually

every 1 second.

Flashes in blue

Low power

Flashes quickly in blue lightThe transmitter and the receiver waits for pairing

Off

Flashes in red

Flashes in blueOff

Flashes continually

every 2.5 seconds.

The transmitter and the receiver connects.

The transmitter and the receiver disconnects.

Receiver unit is turned OFF(Transmitter is still ON)

Transmitter unit is turned OFF(Receiver is still ON)

Flashes continually

every 1 second.

4. Power OFF/ON

5. Pair

This botton is for connecting signal.

For details, please see “How to connect transmitter

and receiver” on page 13.

6. Antenna

Transmitter (TX4 Pro)

Receiver (BY-WM4 RXD)

Feature：

Troubleshooting

• Ideal for Youtubes, vloggings, facebooks, podcasts,

mobile journalisms and more

• Digital 2.4 GHz frequency band

• Dual-Channel wireless receiver

• Ultracompact and miniature-size for receiver

• Super-clear recording sound

• Up to 60m (197ft) operation range (without obstacle)

• Monitoring sound by 3.5mm headphone output

• Master volume control

• Selectable stereo and mono mode

(For BY-WM4 RXD/RXU only)

• Omnidirectional lavalier microphone

• Standard camera shoe mount and clip included

(For BY-WM4 PRO/BY-WM4 PRO-K2 only)

• Hard case included

• Compatible with smartphones, DSLR cameras,

consumer camcorders, PCs etc

(For BY-WM4 PRO/BY-WM4 PRO-K2 only)

• Compatible with smartphones,tablets, laptops

(For BY-WM4 PRO-K3/K5 only)

CAUTION

1.Please use our original audio signal cable which is

equipped, it’s more compatible with the wireless

microphone, and make the sound better.

2.The figure given is only the approximate value that

applies when there are no obstructions between the

transmitter and receiver. This distance will vary

depending on metal objects, people and other

obstructions and on the signal strength.

3.Battery life may vary depending on the type of

battery used.

IMPORTANT

• If you do not intend to use the wireless microphone

for a long period time, please remove the batteries

from both the transmitter and receiver.

• Do not touch the lavalier/lapel microphone,

transmitter and receiver while recording, as this will

cause noise to be recorded.

• Do not let the transmitter close to high-voltage

equipment or to devices that emit strong electrom-

agnetic fields, otherwise, it may cause the noise to

be recorded.

• Do not use or leave the transmitter and receiver in

hot, humid places.

• Do not leave the receiver attached to the camera

when storing the camera in a case.

• Do not mix up to use the transmitter and receiver.

WARNING

• Keep the wireless microphone out of the reach of

children.

• Never use leaking batteries and never expose

batteries to excessive heat or fire.

MAINTENANCE

• Do not operate the device with wet hands or feet.

• Clean the equipment only in the way described in

the instructions for use.

• Take care to prevent the equipment from dropping

down.Make sure that the device is properly fastened

and reliably mounted. If the device has dropped down

on the floor have it inspected by a skilled electrician

before you switch it on again.

• Should the equipment be damaged or defective,or if

you notice a scorching smell:

Interrupt the electric power supply immediately by

removing the batteries.Do not operate the device

with a damaged housing,do not repair the device

yourself. Have the device only repaired by a skilled

electrician.

• Always keep your device in good condition,as

specified in these in-structions for use.

• Do not open the device.

WARNING

FCC STATEMENT :

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.

Warning:

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 interfer-

ence 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 partic-

ular 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.

RF warning statement:

The device has been evaluated to meet general RF

exposure requirement. The device can be used in

portable exposure condition without restriction

www.boya-mic.com

1. Mount receiver to Smartphone, tablet, Mac or laptop.

2. Using TRRS cable, plug the 3.5 mm connector(straight

plug) into the audio jack of your smartphone.

3. Insert the 90° plug of the connecting cable into

the receiver “LINE OUT” jack.

4. Insert earphone into receiver “ ” for monitoring

Sound if you need.

5. Slider the power ON/OFF switch to ON position ( the

LED indicator will light in blue)

Caution: Please do not mix up plug, for details, please

refer to” What’s difference” on page 8.

1. Mount receiver to cameras, camcorders, audio

recorders and other audio/video recording devices.

2. Using TRS cable, plug the 3.5 mm connector into the

audio jack of your camera.

3. Insert the other end of the connecting cable into

the receiver “LINE OUT” jack.

4. Insert earphone into receiver “ ” for monitoring

Sound if you need.

5. Slider the power ON/OFF switch to ON position ( the

LED indicator will light in blue)

Caution: Please do not mix up audio cable, for details,

please refer to” What’s difference on page 8”.

Installing or uninstalling clip

1. Clip is mounted on the microphone before leaving

factory.

2. Both transmitter and receiver include clip, that means

you can mount them in any place you want.

3. Adjust the direction of the microphone to your mouth

by rotating the Microphone.

1. Headphone Jack

6. M/S Switch

5. Pair Bottom

7. Built-In Internal Antenna

2. Power LED

3. Lightning Connector

4. Volume +/-

For more details about LED indicator, please refer to

as following:

Status Receiver Transmitter

Flashes continually

every 1 second.

Flashes in blue

Low power

Flashes quickly in blue lightThe transmitter and the receiver waits for pairing

Off

Flashes in red

Flashes in blueOff

Flashes continually

every 2.5 seconds.

The transmitter and the receiver connects.

The transmitter and the receiver disconnects.

Receiver unit is turned OFF(Transmitter is still ON)

Transmitter unit is turned OFF(Receiver is still ON)

Flashes continually

every 1 second.

Stays blue

2. Power LED

If transmitters and receiver disconnect, please follow

below steps:

Otherwise, the light for receiver and transmitters will

flash continually every 1 second, then try 1-4 steps

again.

Before leaving factory, the connection of transmitters

and receiver will be established.

1. Turn on the receiver and the transmitters.

2. Press the button “+” and “-“ for 3 seconds for

receiver and press "Pair" of one transmitter for 3

seconds at the same time.

3. When transmitter and receiver connects, the light

of receiver will stay blue, the light of transmitters

will flash every 2.5 seconds.

4. Repeat step 2 for the other transmitter.

If receiver need to be mounted onto camera hot/cold

shoe, please follow below steps:

1. Push the clip to right side.

2. Push the cold shoe mount on the position.

3. Mounted receiver onto camera hot/cold shoe

BY-WM4 PRO

Dual-Channel Digital Wireless Microphone

BY-WM4 RXD

BY-WM4 Pro System

⑨

NOTE:

Not all Android devices support external microphone

when taking video, and you may need to download a

third-party app and set up sound source as external

microphone.

Specifications:

RF Modulation:

Frequency band:

Frequency response:

Signal/Noise:

Distortion:

RF output level:

Earphone output level:

Reception sensitivity:

Audio input connector:

Operation range:

Power requirements:

Plug:

Consumption power:

Dimensions:

Weight:

GFSK (Gauss frequency Shift Keying)

2.4 GHz (2405-2478MHz)

35Hz-14KHz±3dB

84dB or more

0.05% or less (32Ω,1 KHz,65mW output)

3mW

32Ω,65mW

-90dB +/- 3dB / 0dB=1V/Pa, 1kHz

3.5mm mini jack

60m (197ft) (without obstacle)

TX4 Pro/RX4 Pro: 3V DC (Two AAA size batteries)

BY-WM4 RXD: Supplied by iOS device

BY-WM4 RXU: Supplied by USB Type-C device

BY-WM4 RXD: Apple MFi Certified Lightning Connector

BY-WM4 RXU: USB Type-C Connector

Receiver：3V/70mA Transmitter: 3V/70mA

TX4 Pro/RX4 Pro: 45x70x35mm (1.8x2.8x1.4”)

BY-WM4 RXD: 82×30.7×12mm (3.2×1.2×0.5”)

BY-WM4 RXU: 82×30.7×12mm (3.2×1.2×0.5”)

TX4 Pro/RX4 Pro: 47g (1.7 oz)

BY-WM4 RXD: 12g (0.4oz)

BY-WM4 RXU: 9.5g (0.3oz)

BY-WM4 Pro-K2 consists of two body-pack

transmitters(TX4 Pro), a portable receiver

(RX4 Pro), and their accessories as

following:

BY-WM4 Pro-K3 is specially designed for

Lightning iOS Devices.

It consists of one body-pack transmitter

(TX4 Pro), wireless receiver with a Lightning

connector (BY-WM4 RXD),and their

accessories as following:

BY-WM4 Pro-K5 specially designed for

Andriod and other Type-C devices.

It consists of one body-pack transmitter

(TX4 Pro), wireless receiver with a USB

Type-C connector (BY-WM4 RXU),and

their accessories as following:

Transmitter(TX4 Pro) x2 Receiver(RX4 Pro)

Receiver(BY-WM4 RXD)

Lavalier/lapel microphone x2 3.5mm to TRS audio output cable

3.5mm to TRRS audio output cable

Transmitter(TX4 Pro)

Lavalier/lapel microphone

Microphone Holder clipWind screen

Cold-shoe mount

Microphone Holder clip (x2)Wind screen (x2)

Microphone Holder clip

Wind screen

Pairing Pin

Cold-shoe mount

1. Plug the BY-WM4 RXU directly into the lightning port

of smartphone.

2. The Power LED flashes slowly waiting for connecting

with the transmitter.

If you have any problem using the BY-WM4 Pro

components, use the following checklist. If any problem

persist, please consult our local dealer, or contact us

directly.

Press these buttons to set the attenuation level

of the input signal.

For more details, please see “Connecting the

transmitter and the receiver” on page 26.

Receiver (BY-WM4 RXU)

6. M/S Switch

5. Pair Bottom

7. Built-In Internal Antenna

3. USB Type-C Connector

4. Volume +/-

BY-WM4 RXU

Status Cause Measure

The units does

not turn on.

The batteries

become drained

quickly.

There is

no sound.

The sound

is weak.

There is distortion

in the sound.

The batteries of BY-WM4 PRO

TX exhausted.

The Power LED of BY-WM4 RXD

doesn’t light up while connecting

with the iOS devices.

The Power LED of BY-WM4 RXU

doesn’t light up while connecting

with the Android devices.

The BY-WM4 Pro components

is being used under extremely

cold conditions.

The BY-WM4 Pro components

is being used under extremely

hot conditions.

The transmitter and receiver

are not in pairing mode.

The batteries drain quickly under

extremely cold conditions.

The batteries drain quickly under

extremely hot conditions.

Please refer to the Connecting

the transmitter and the Receiver.

The input level of the receiver

is low.

The input level of the receiver

is inappropriate.

Headphones with a monaural

mini jack is used.

The input level of the transmitter

is low. Adjust the audio output

level on the transmitter. Keep this

level as high as possible without

distortion to reach best Sound

and Noise Ratio.

Adjust the audio output level on

the transmitter. Keep this level

as high as possible without

distortion to reach best Sound

and Noise Ratio.

Use the headphones with a

stereo mini jack.

There do not have a good

connection with the lavalier.

There do not have a good

connection with the earphone.

Please try to reconnect it again.

The receiver hasn’t get a well

connection with the devices.

Please try to reconnect it again .

Open the audio/video app on

mobile device, then the indicator

of receiver should be light up.

Replace the batteries with

new ones.

Too much

ambience is

being picked up.

The audio is noisy

or distorted. This

can include

dropouts, white

noise, bursts,

pops and clicks.

When using an omnidirectional

microphone like the one

included with this system, the

microphone may be picking up

too much ambience.

RF interference

RF signal is weak.

Make sure the microphone is as

close as to the subject as possible.

There can be a lot of RF interference

outdoors.

Try moving indoors, where there is

less RF interference.

Overhead telephone lines,

fluorescent lighting, and metal

fences can all cause interference.

Turn off all nearby computers and

mobile phones.

Make sure there is an unobstructed

line of sight between the transmitter

and the receiver.

Keep in mind that your body,

clothes, and onstage sets are

possible obstructions.

Make sure the receiver and the

transmitter are within 197' (60m)

range. If there are obstructions, you

may need to move closer.

Receiver(BY-WM4 RXU) Transmitter(TX4 Pro)

Lavalier/lapel microphone

Microphone Holder clip

Wind screen

(3.5mm diameter stereo mini jack)

To monitor the receiver output, connect the

headphones to this connector.

1. Headphone Jack

(3.5mm diameter stereo mini jack)

To monitor the receiver output, connect the

headphones to this connector.

Pairing Pin

2.4GHz Wireless Receiver

For iOS devices

2.4GHz Wireless Receiver

For Android and other Type-C devices

SHENZHEN JIAYZ PHOTO INDUSTRIAL., LTD.

The BOYA logo is a trademark which is registered and owned by

Shenzhen Jiayz Photo Industrial., Ltd.

COPY RIGHT 2010-2020

TEL: 400 6131096

Email: sales@boya-mic.com

www.boya-mic.com / www.jiayz.com

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受控文件

2020-4-20

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