Godox AD400PRO User Manual

一体式外拍闪光灯

All-in-One Outdoor Flash

AD

400

深圳市神牛摄影器材有限公司

GODOX Photo Equipment Co., Ltd.

地址/Add: 深圳市宝安区福海街道塘尾社区耀川工业区厂房2栋1层至4层、4栋1层至4层
1st to 4th Floor, Building 2/ 1st to 4th Floor, Building 4, Yaochuan Industrial Zone,
Tangwei Community, Fuhai Street, Bao’an District, Shenzhen 518103, China

电话/Tel: [phone](8062) 传真/Fax: [phone]
邮箱/E-mail: [e-mail] http://www.godox.com

705-AD600P-06

Made In China

中英文双语 / Chinese English Bilingual

说明手册 / INSTRUCTION MANUAL

Foreword

Warning

Before using this product

Please read this user manual carefully in order to ensure your safety and the proper operation of this product. Keep
for future reference.

Thank you for purchasing a GODOX product.

WITSTRO All-in-One Outdoor Flash AD400Pro has strong power, all-in-one lithium battery pack and great
portability. When using Godox 2.4G wireless X system off camera, AD400Pro can be triggered by XPro and X1
series flash trigger in TTL/M/Multi mode, etc. With master & slave functions, AD400Pro can also use in combination
with Godox TTL camera flashes, TTL outdoor flashes, TTL studio flashes, etc. With this AD400Pro flash, your
shooting will become simpler. You can easily achieve a correct flash exposure even in complex light-changing
environments.
WITSTRO AD400Pro offers studio quality light for outdoor and live shooting with strong power and large capacity
lithium battery pack. The powerful and portable AD400Pro meets the demands of freelance commercial
photographers, photojournalists, wedding and beach portraiture shooters, event and backpack photographers,
photograph enthusiasts, etc. The AD400Pro offers:

• Quick recycle time: 0.01-1s.

• Stable color temperature mode: color temperature changes within ±75K over the entire power range.

• LED modeling lamp: 30W LED modeling lamp whose light brightness can be freely adjusted.

• Precise power output: power adjusts from full power 1/256 to 1/1 in 25 steps.

• Advanced functions: 1/8000s high-speed sync flash, multi flash, high-speed sync triggering, etc.

• Compatible wireless TTL system: with built-in Godox 2.4G wireless X system, AD400Pro is compatible with

Canon, Nikon, Sony, FUJIFILM, Olympus and Panasonic TTL autoflash system.

• Wireless control: with built-in Godox 2.4G wireless X system to achieve TTL control. It can also be used to
wirelessly adjust flash power level and trigger the flash through the wireless control port.
AD400Pro has 3.5mm sync cord jack to achieve various sync triggering mode.

• Dot-matrix LCD panel: with clear and convenient operation.

• Studio quality light: up to 400Ws, GN 72 (m ISO 100, with high-efficiency standard reflector).

• With New Godox-mount and the included Bowens-mount adapter ring, AD400Pro can install different

accessories by replacing its adapter ring(separately sold), such as accessories of Broncolor, Prophoto,
Elinchrom, etc.

Always keep this product dry. Do not use in rain or in damp conditions.
Do not disassemble. Should repairs become necessary, this product must be sent to an authorized
maintenance center.
Keep out of reach of children.
Stop using this product if it breaks open due to extrusion, falling or strong hit. Otherwise, electric shock may
occur if you touch the electronic parts inside it.
Do not fire the flash directly into the eyes (especially those of babies) within short distances. Otherwise visual
impairment may occur.
Do not use the flash unit in the presence of flammable gases, chemicals and other similar materials. In certain
circumstance, these materials may be sensitive to the strong light emitting from this flash unit and fire or
electromagnetic interference may result.
Do not leave or store the flash unit if the ambient temperature reads over 50°C.Otherwise the electronic parts

may be damaged.
Turn off the flash unit immediately in the event of malfunction.

- 23 -

- 24 -

Conventions used in this Manual
This manual is based on the assumption that both the camera and camera
flash’s power switches are powered on.
Reference page numbers are indicated by “p.**”.
The following alert symbols are used in this manual:
The Caution symbol indicates a warning to prevent shooting problem.
The Note symbol gives supplemental information.

Contents

Foreword

23

Warning

24

Name of Parts

27

Body
Control Panel
LCD Panel
Included Accessories
Separately Sold Accessories

Replacing Adapter Rings and Accessories

30

Installing Reflector (Other Accessories)

30

Attaching Flash Tube

30

Adjusting Handle

30

Detaching the Mounting Bracket

31

Detaching the Handle

31

Battery

31

Power Management

32

Wireless Flash Mode

32

Flash Mode— TTL Autoflash

33

FEC (Flash Exposure Compensation)

High-Speed Sync

Flash Mode—M: Manual Flash

34

Stable Color Temperature Function

Flash Mode—Multi/Stroboscopic Flash

36

Wireless Flash Shooting: Radio (2.4G) Transmission

37

Wireless Settings
Setting the Communication Channel
Setting the Communication Group
Wireless Flash Shooting

C.Fn: Setting Custom Functions

40

Modeling Lamp

41

Other Applications

41

Sync Triggering

Protection Function

42

Technical Data

43

Troubleshooting

44

Firmware Upgrade

44

Maintenance

44

- 25 -

- 26 -

Name of Parts Name of Parts

Body:Body:

<MODE> Mode Selection Button

Mount Fixing Screw

Umbrella
Mounting Hole

Mounting Bracket

< > Wireless
Selection Button

<GR/CH> Group/Channel

Button

<MENU> Menu Button

<SET>Set Button

Select Dial

< >Test Button /

Flash Ready Indicator

< >Power Switch

< >Modeling Lamp Button

< H>High Speed

Sync Button

Bracket Locking Ring

Body:

Fan Inlet

Power Outlet

Battery Power
Jack

Battery Locking
Ring

Power Inlet

Lithium Battery

Handle Fixed Part

Direction

Adjusting Handle

Bracket Fixing

Screw

Socket for
Portable Flash Head

Accessory
Mount

Tube Socket

Modeling
Lamp (LED)

Accessory
Locking Ring

Fan Outlet

Handle Fixing
Screw

3.5mm Sync Cord Jack

LCD Panel:

Type-C USB Port

Battery

Indicator

Button

Light Sensor

- 27 - - 28 -

(1) TTL Autoflash

CH 1

A

TTL

+0.3

10%

TTL:TTL Autoflash

High Speed Sync

Flash exposure

compensation amount

Name of Parts Name of Parts

LCD Panel:

(2) M Manual Flash

Flash duration

(3) Multi Flash

(4) Radio Transmission Shooting

Channel

Firing group

A

t.1 1/10100

A

CH 1

A

M

1/256

Multi

1/256

5 - 5 Hz

Multi

1/256

5 - 5 Hz

10%

OFF

OFF

M: Manualflash

Manual flash output

Multi:Stroboscopic flash

Flash frequency

Number of flashes

: Radio transmission

wireless shooting

Separately Sold Accessories

The product can be used in combination with the following accessories sold separately, so as to achieve best
photography effects: Xpro & X1 Wireless Flash Trigger, Softbox, Beauty Dish, Fold up Umbrella, Snoots,
Light Stand, etc.

Replacing Adapter Rings and Accessories

1. Remove the reflector or other
accessories from the flash head.

2. Loosen the two Mount Fixing Screws.

3. Match the Accessory Locking Ring of

Bowens-mount or other mount
adapter ring to the Accessory Locking
Ring of the flash and push it in.

(4) Optical transmission wireless shooting

S2

M

S1/S2

A

1/256

OFF

Included Accessories

1. Flash tube 2. Lithium battery pack 3.Battery charger 4. Power cord 5. Standard Reflector

6.Bowens-mount adapter ring 7.Wrench 8. Portable Bag 9. Instruction manual

1 2

3

4

- 29 -

5 6

7

8

4. Tighten the two screws and use

another two screws provided to fix.

5. Install the Bowens-mount
accessories or other corresponding
accessories.

Attaching Flash Tube

1. Remove the reflector or other
accessories from the flash head.

5

● Note: To avoid damage, please detach the flash tube during the transportation.

2. Match the flash tube in the Tube
Socket. Push the flash tube in until it
is securely seated into the socket.

- 30 -

6. If needed to use new Godox-mount
accessories after installing the adapter ring
of other brand, please split the reflector
and insert it into the new Godox mount to
install the required accessories(How to
detach the standard reflector: hold the two
ends and detach it.). Or install the new
Godox-mount softbox directly (except for
Profoto-mount adapter ring).

Adjusting Handle

0

180

Loading and Unloading the Battery Pack

Loading:

1. When the Direction Adjusting Handle
is not pulled out, screw clockwise
while unscrew anti clockwise.

Detaching the
Mounting Bracket

1. Insert a coin or corresponding
wrench(not included) into the Bracket
Fixing Screw and loosen it anti­clockwise to detach.

2. The Direction Adjusting Handle's rotation angle should be restrained from 0 to
180 degrees below the flash body. Please pull out the Direction Adjusting
Handle, adjust the appropriate angle, and manipulate the step 1 before colliding
with the flash body.

Detaching the Handle

1. Insert the included wrench into the
Handle Fixing Screw and loosen it anti­clockwise to detach.

Battery

Features

1. This flash unit uses Li-ion polymer battery which has long runtime. The available charge-and-discharge times are

over 300.

2. It is reliably safe. The inner circuit is against overcharge, overdischarge, overcurrent, and short circuit.

3. Take only 2 hours to fully charge the battery by using the standard battery charger.

Cautions

Do not short circuit.
Do not expose to rain or immerse into water. This battery is not water proof.
Keep out of reach of children.
No over 24 hours' continuous charging.
Store in dry, cool, ventilated places.
Do not put aside or into fire.
Dead batteries should be disposed according to local regulations.

Please charge the battery to approx. 60% before being placed for long time.
If the battery had ceased using for over 3 months, please make a full recharge.

- 31 - - 32 -

Match the buckles of the battery

1 and the main body. .

Unloading:

Push the Battery Locking Ring

1 backwardly.

Push down the battery pack

2 until it is locked.

Push the battery pack upward

2 to unload it.

Battery Level Indication

Attach the battery pack to the flash correctly. Be aware of the battery level by check the battery level indication on
the LCD panel when using.

Battery Level Indication
on the LCD Panel

(Indicating battery level and
management of the whole flash
system)

3 grids
2 grids
1 grid
Blank grid
Low battery and
charging reminder

Note: The indications are almost the same except of grids shift.

LED Battery Level Indication on
the Battery

(Indicating battery level and
management of non-loaded battery)

1 red grid +3 green grids
1 red grid +2 green grids
1 red grid +1 green grid
1 red grid
2%: red light blinks
1%: the indicator is off.

Meaning/Percentage of Battery Level

75%~100%
50%~75%
25%~50%
3%~25%
<2%

The battery level is going to be used out immediately.
And the flash will alarm for the 1 minute and auto power
off in 3 minutes. Note: Please recharge the battery as
soon as possible (within 10 days). Then, the battery can
be used or be placed for long period.

Power Management

Long press the Power Switch for 1 seconds to control the on/off of the flash unit. Turn off the power pack if the flash
unit will not be used for an extended period. This product has auto power off function. The flash will auto power off
in 30 to 120 min. which is set on C.Fn-STANDBY.

Wireless Flash Mode

AD400Pro can only be set as slave unit (receiver end). Press Wireless Selection Button to switch.

MODE

MENU

GR/CH

10%

MODE

MENU

GR/CH

MODE

MENU

GR/CH

10%

MODE

MENU

GR/CH

10%

Flash Mode — TTL Autoflash

MODE

MENU

GR/CH

Flash Mode — M: Manual Flash

This flash has three flash modes: TTL, Manual (M), and Multi (Stroboscopic). In TTL mode, the camera and the
flash will work together to calculate the correct exposure for the subject and the background.
* Press <MODE> Mode Selection Button and three flash modes will display on the LCD panel one by one with each
pressing.

TTL Mode

Press <MODE > Mode Selection Button to enter TTL mode. The LCD panel will display <TTL> .

　　 FEC: Flash Exposure Compensation

With FEC function, this flash can adjust from -3 to +3 in 1/3rd stops. It is useful in situations where minor adjusting
of the TTL system is needed based on the environment.

Setting FEC:

CH 1

TTL

+0.3

A

10%

Press <SET> Button and

1 flash exposure compensation

amount will be highlighted on
the LCD panel.

High-Speed Sync

High Speed Sync (FP flash) enables the flash to synchronize with all camera shutter speeds. This is convenient
when you want to use aperture priority for fill-flash portraits.

Set the flash exposure compensation

2 amount.

● Turn the Select Dial to set the
amount.

● “0.3”means 1/3 step, “0.7”means 2/3
step.

● To cancel the flash exposure
compensation, set the amount to
“+0”.

Press < SET > button again

3 to confirm the setting.

The flash output is adjustable from 1/1 full power to 1/256th power in 0.1 stop increments. To obtain a correct flash
exposure, use a hand-held flash meter to determine the required flash output.

CH 1

A

M

1/256+0.1

10%

Press < MODE > button so

1 that < M > is displayed.

In M manual flash mode, press <MENU> button to enter C.Fn-SLAVE to choose S1 function, so that this flash can
function as an optical S1 secondary flash with optic sensor. With this function, the flash will fire synchronously when
the main flash fires, the same effect as that by the use of radio triggers. This helps create multiple lighting effects.

Press < MENU > button to enter C.Fn-SLAVE to choose S2 function, so that this flash can also function as an
optical S2 secondary flash with optical sensor in M manual flash mode. This is useful when cameras have pre-flash
function. With this function, the flash will ignore a single “preflash” from the main flash and will only fire in response
to the second, actual flash from the main unit.

● S1 and S2 optical triggering is only available in M manual flash mode.

Turn the Select Dial to choose a

2 desired flash output amount.

Optical S1 Secondary Unit Setting

Optical S2 Secondary Unit Setting

Press < SET > button again

3 to confirm the setting.

CH 1

TTL

+0.3

A

10%

Press High Speed Sync Button

1

so that < > is displayed.

● If you set a shutter speed that is the same as or slower than the camera’s maximum flash sync speed, < >
will not be displayed in the viewfinder.

● With high-speed sync, the faster the shutter speed, the shorter the effective flash range.

● To return to normal flash, press < > button again. Then < > will disappear.

● Multi flash mode cannot be set in high-speed sync mode.

● Over-temperature protection may be activated after 50 consecutive high-speed sync flashes.

Please use XPro or X1 series

2 transmitter.

- 33 - - 34 -

MODE

MENU

GR/CH

MODE

MENU

GR/CH

10%

Flash Mode — M: Manual Flash

Flash Mode — Multi: Stroboscopic Flash

Display Flash Duration

Flash duration refers to the length of time that from flash’s firing to reach the half peak at maximum. The half peak
at maximum is usually expressed as t=0.5. In order to provide the photographer with more concrete data, this
product adopts t=0.1. The difference between t=0.5 and t=0.1 is shown in the following picture.

A

50%

10%

t

t=0.5

t=0.1

CH 1

A

t.1 1/10100

● The flash duration will only be displayed on the LCD panel in M mode.

M

1/256

10%

Stable Color Temperature Function

When use this function, the color temperature changes within ±75K over the entire power range: enter MENU
C.Fn-COLOR and set it as ON, which means the color temperature function is turned on. When adjusting the power
output from high to low in M mode, Flash Ready Indicator will blink (the beeper will alarm for 1 minute). Now
press the Test Button to discharge, and the flash can be used as normal.

C.Fn

Ver0.6

CH 1

MCOLOR

COLOR

SLAVE
MODEL
STANDBY

● This function can only be supported in M non-high-speed mode.

OFF
ON

A

t.1 1/5840

- 35 - - 36 -

1/256

10%

With stroboscopic flash, a rapid series of flashes is fired. It can be used to capture a multiple images of a moving
subject in a single photograph. You can set the firing frequency (number of flashes per sec. expressed as Hz), the
number of flashes, and the flash output.

CH 1

Multi

1/256

A

Press <MODE> button so that

1 <MULTI> is displayed.

Calculating the Shutter Speed

During stroboscopic flash, the shutter remains open until the firing stops. Use the formula below to calculate the
shutter speed and set it with the camera.

Number of Flashes / Flash Frequency = Shutter Speed

For example, if the number of flashes is 10 and the firing frequency is 5 Hz, the shutter speed should be at least 2
seconds.

To avoid overheating and deteriorating the flash head, do not use stroboscopic flash more than 10 times in
succession. After 10 times, allow the camera flash to rest for at least 15 minutes. If you try to use the stroboscopic
flash more than 10 times in succession, the firing might stop automatically to protect the flash head. If this happens,
allow at least 15 minutes' rest for the flash.

● Stroboscopic flash is most effective with a highly reflective subject against a dark background.

● Using a tripod and a remote control is recommended.

● A flash output of 1/1 and 1/2 cannot be set for stroboscopic flash.

● Stroboscopic flash can be used with“buLb”.

● If the number of flashes is displayed as “--”, the firing will continue until the shutter closes or the battery is

exhausted. The number of flashes will be limited as shown by the following table.

Maximum Stroboscopic Flashes:

Flash
Output

1/16

1/32

1/64

1/128

1/256

1/4

1/8

Hz

1

2

3

7

6

5

14

14

12

30

30

30

60

60

60

90

90

90

100

100

100

100

100

100

Turn the Select Dial to choose

2 a desired flash output.

4

4

10

20

50

80

100

100

100

100

5

4

8

20

50

80

5 - 5 Hz

6-7

8-9

3

6

20

10

40

30

70

60

90

80

90

80

OFF

Set the flash frequency and flash

3 times.

● Press <SET> Button to select the
flash times. Turn the Select Dial to
set the number.

● Press <SET> Button to select the
flash frequency. Turn the Select
Dial to set the number.

● After you finish the setting, press
<SET> button and all the settings
will be displayed.

10

11

12-14

15-19

20-50

60-100

3

2

2

2

2

2

2

5

4

4

4

4

4

4

8

8

8

8

8

8

20

20

20

18

16

12

50

40

40

35

30

20

70

70

60

50

40

40

70

70

60

50

40

40

MODE

MENU

GR/CH

MODE

MENU

GR/CH

10%

MODE

MENU

GR/CH

10%

MODE

MENU

GR/CH

10%

Wireless Flash Shooting: Radio (2.4G) Transmission

Wireless Flash Shooting: Radio (2.4G) Transmission

AD400Pro adopts Godox 2.4G wireless X system, which has good compatibility with other products of our
company.
As a slave unit, AD400Pro is automatically compatible with Canon E-TTL II, Nikon i-TTL, Sony, Olympus, Panasonic
and FUJIFILM system according to the master unit.

*As a slave unit, AD400Pro can be controlled by the following master units: XPro series, X1T series, AD360II series,
V860II series, V350 series,TT685 series,TT600 series, TT350 series, etc.

CH 1

TTL

+0.3

A

10%

1. Wireless Settings

Press < > Wireless Setting Button again until < > is displayed on the panel.

CH 1

TTL

+0.3

A

10%

2. Setting the Communication Channel

If there are other wireless flash systems nearby, you can change the channel IDs to prevent signal interference. The
channel IDs of the master unit and the slave unit(s) must be set to the same.

CH32

TTL

3. Setting the Communication Group

Short press the < GR/CH > Button to choose group ID from A to E.

CH 1

Multi

1/256

E

4. Wireless Flash Shooting

Positioning and Operation Range (Example of wireless flash shooting)

● Autoflash Shooting with One Slave Unit

Transmission distance is about 100m

● Use master unit with wireless transmitting function as the transmitter end.

● Before shooting, perform a test flash and test shooting.

● The transmission distance might be shorter depending on the conditions such as positioning of slave units, the

surrounding environment and whether conditions.

5 - 5 Hz

OFF

Long press the <GR/CH>

1 Button for 2 seconds so that

channels ID is displayed on
the LCD panel.

Ver0.6

99

C.Fn

LCD

ID

RESET

+0.3

A

10%

Turn the Select Dial to choose a

2 channel ID from 1 to 32.

Wireless ID setting: press the MENU button to enter C.Fn-ID and

Press the <SET> button to

3 confirm.

4 choose from 01 to 99 (Note: this can only be achieved when the master

unit also has this function).

- 37 - - 38 -

Wireless Flash Shooting: Radio (2.4G) Transmission

C.Fn: Setting Custom Functions

Wireless Multiple Flash Shooting

You can divide the slave units into two or three groups and perform TTL autoflash while changing the flash ratio
(factor). In addition, you can set and shoot with a different flash mode for each firing group.

● Auto Shooting with Two Slave Groups

A

B

● Auto Shooting with Three Slave Groups

C

A

B

The Reason & Solution of Not Triggering in Godox 2.4G Wireless

1. Disturbed by the 2.4G signal in outer environment (e.g. wireless base station, 2.4G wifi router,
Bluetooth, etc.)

→ To adjust the channel CH setting on the flash trigger (add 10+ channels) and use the channel which is not
disturbed. Or turn off the other 2.4G equipment in working.

2. Please make sure that whether the flash has finished its recycle or caught up with the continuous
shooting speed or not(the flash ready indicator is lighten) and the flash is not under the state of
over-heat protection or other abnormal situation.

→Please downgrade the flash power output. If the flash is in TTL mode, please try to change it to M mode(a
preflash is needed in TTL mode).

3. Whether the distance between the flash trigger and the flash is too close or not

→Please turn on the “close distance wireless mode” on the flash trigger (＜0.5m):
　 X1 series: press the test button and hold on, then turning it on until the flash ready indicator blinks for 2

times.
　 XPro series: Set the C.Fn-DIST to 0-30m.

4. Whether the flash trigger and the receiver end equipment are in the low battery states or not

　→Please replace the battery(the flash trigger is recommended to use 1.5V disposable alkaline battery).

- 39 -

Custom Function

Signs

COLOR

SLAVE

MODEL

STANDBY

LIGHT

Delay

UNITS

ALT

LCD

ID

BEEP

RESET

1. Press < MENU > Button to enter C.Fn menu. The “Ver x.x” in the top-right corner refers to the software version.

2. Select the Custom Function Signs.

• Turn the Select Dial to select the Custom Function Signs.

3. Change the Setting.

• Press <SET> button and the setting signs are highlighted.

• Turn the Select Dial to set the desired number. Press <SET> button will confirm the settings.

4. Exit C.Fn Menu.

• Press <MENU> Button to exit.

Functions

Stable color
temperature

S1/S2 mode selection

Modeling lamp

Auto power off

Backlighting time

Delay flash

Total number of flashes

Triggering times

LCD contrast

Wireless ID

Beeper

Parameter resetting

Setting Signs Settings & Descriptions

ON

OFF

OFF

S1

S2

CONT

INTER

OFF

30min

60min

90min

120min

15sec

OFF

ON

OFF, 0.01~30S

2~4

1- 4

-3 ~ +3

OFF

01-99

ON

OFF

NO

YES

- 40 -

Off after finishing the flash recycle

Can be triggered as second curtain

Use UNITS in combination with

ALT: UNITS sets the total

number of flashes; ALT sets the

triggering times before flash’s firing

ON

OFF

OFF

S1 mode

S2 mode

Continuous lighting

OFF

Auto power off without

any operation

Off in 15 sec.

Always off

Always lighting

7 levels

off

Choose from 01 to 99

ON

OFF

Reset

Restrictions

M

Non high-speed

mode

M mode

NO

NO

NO

M/Multi mode

M mode

M mode

Wireless mode

NO

NO

MODE

MENU

GR/CH

10%

Modeling Lamp

Protection Function

Modeling Lamp

AD400Pro is equipped with a 30W LED modeling lamp which has two continuous lighting modes.

• There are three modes: OFF, Percentage and PROP. Short press the Modeling Lamp Button, and the

three mode will be displayed on the LCD panel in sequence:

1. OFF: the modeling lamp is off.

2. Percentage: 10%~100%(to prevent overheat, <30% the fan rotates in low speed while >30% in high speed).

3. PROP: The modeling lamp's power changes with the flash's power. The bigger power the flash has, the
brighter the modeling lamp is(to prevent overheat, <1/64 the fan rotates in low speed while >1/64 in high
speed).

• Long press the modeling lamp for 2 seconds to adjust the percentage of modeling lamp from 10% to

100%.

CH 1

A

t.1 1/10100

M

1/256+0.3

10%

Other Applications

Sync Triggering

The Sync Cord Jack is a Φ3.5mm plug. Insert a trigger plug here and the flash will be fired synchronously with the

camera shutter.

1. Over-Temperature Protection

● To avoid overheating and deteriorating the flash head, do not fire more than 75 continuous flashes in fast

succession at 1/1 full power. After 75 continuous flashes, allow a rest time of at least 5 minutes.

● If you fire more than 75 continuous flashes and then fire more flashes in short intervals, the inner over-

temperature protection function may be activated and make the recycling time over 10 seconds. If this occurs,
allow a rest time of about 5 minutes, and the flash unit will then return to normal.

● When the over-temperature protection is started, is shown on the LCD display.

Number of flashes that will activate over-temperature protection:

Power Output Level

1/1

1/2 (+0.7~+0.9)

1/2 (+0.3~+0.6)

1/2 (+0.0~+0.2)

1/4 (+0.0~+0.9)

1/8 (+0.0~+0.9)

1/16 (+0.0~+0.9)

1/32 (+0.0~+0.9)

1/64 (+0.0~+0.9)

1/128 (+0.0~+0.9)

1/256 (+0.0~+0.9)

Number of flashes that will activate over-temperature protection in high-speed sync triggering mode:

Power Output

1/1

1/2 (+0.0~+0.9)

1/4 (+0.0~+0.9)

1/8 (+0.0~+0.9)

1/16 (+0.0~+0.9)

1/32 (+0.0~+0.9)

1/64 (+0.0~+0.9)

1/128 (+0.0~+0.9)

1/256 (+0.0~+0.9)

Number of Flashes

75

100

120

150

200

300

400

500

1000

Times

50

60

75

100

150

200

300

2. Other Protections

● The system provides real-time protection to secure the device and your safety. The following lists prompts for
your reference:

LCD Panel

Error 1

Error 3

Error 9

Meaning

A failure occurs on the recycling system so that the flash cannot fire.Please restart the
flash unit. If the problem still exists, please send this product to a maintenance center.

The voltage on two outlets of the flash tube is too high.
Please send this product to a maintenance center.

There are some errors occurred during the upgrading process.
Please using the correct firmware upgrade method.

- 41 - - 42 -

Technical Data

Troubleshooting

Model

Wireless Slave Unit Mode

Flash Mode

Guide No. (m ISO 200)
Flash Duration
POWER
Power Output
Stroboscopic Flash
Flash Exposure Compensation (FEC)
Sync mode
Delay Flash
Mask
Fan
Beeper
Modeling Lamp (LED)
Optical Slave Flash
Flash Duration Indication
Display

• Wireless Flash (2.4G wireless transmission)

Wireless Flash Function
Controllable Slave Groups
Transmission Range (approx.)
Channels
Wireless ID

• Power Supply

Power Supply
Full Power Flashes
Recycle Time
Battery Indicator
Power Indication

• Sync Triggering Mode

• Color Temperature

• Stable Color Temperature Mode

• Dimensions

Dimension (with battery)
Net Weight (with battery)

AD400Pro

Radio transmission mode (compatible with Canon E-TTL II, Nikon i-TTL,
Sony, Olympus, Panasonic and FUJIFILM).
Wireless off
Slave unit of radio transmission
72 (m ISO 100, with high-efficiency standard reflector)
1/230 to 1/12340 seconds (T0.1)
400Ws
9 steps: 1/256~1/1
Provided (up to 100 times, 100Hz)
Manual. Feb: ±3 stops in 1/3 stop increments.

High-speed sync (up to 1/8000 seconds), first-curtain sync, and second-curtain sync

0.01~30 Seconds
√
√
√
30W/4800K/TLIC: 93
S1/S2
√
Dot-matrix panel

Slave, Off
5 (A, B, C, D, E)
100m
32 (1~32)
To avoid signal interference effectively, triggering can only be achieved
when the channels and wireless IDs of the master and slave unit are
set to the same.

Lithium battery pack (21.6V/2600mAh)
380
Approx. 0.01-1s
√
Power off automatically after approx. 30~120 minutes of idle operation.

3.5mm sync line
5600±200K
Changes within ±75K in entire power range

220x102x128 mm (flash tube & reflector not included)

2.1 Kg (flash tube & reflector not included)

M/Multi
TTL/M/Multi

If there is a problem, refer to this Troubleshooting Guide.

The flash exposure is underexposed or overexposed.

● You used high-speed sync.

→With high-speed sync, the effective flash range will be shorter. Make sure the subject is within the effective flash

range displayed.

● You used Manual Flash mode.

→Set the flash mode to TTL or modify the flash output.

Firmware Upgrade

This flash supports firmware upgrade through the USB port. Update information will be released on our
official website.

● USB connection line is not included in this product. As the USB port is a Type-C USB socket, please use the

Type-C USB line.

● As the firmware upgrade needs the support of Godox G3 software, please download and install the "Godox G3

firmware upgrade software" before upgrading. Then, choose the related firmware file.

● As the products needs to do firmware upgrade, please refer to instruction manual of the newest electric version

as final.

Maintenance

● Shut down the device immediately should abnormal operation be detected.

● Avoid sudden impacts and the product should be dedusted regularly.

● It is normal for the flash tube to be warm when in use. Avoid continuous flashes if unnecessary.

● Maintenance of the flash must be performed by our authorized maintenance department which can provide original

accessories.

● This product, except consumables e.g. flash tube, is supported with a one-year warranty.

● Unauthorized service will void the warranty.

● If the product had failures or was wetted, do not use it until it is repaired by professionals.

● Changes made to the specifications or designs may not be reflected in this manual.

- 43 - - 44 -

FCC

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.