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Westcott FJ400 Strobe 1-Light Backpack Kit with FJ-X2m Universal Wireless Trigger and Rapid Box Switch Octa-S

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Original price $0.00 - Original price $0.00
Original price $0.00
$879.90 - $879.90
Current price $879.90
SKU 81143
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Maximum quantity allowed is .
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The FJ400 is the first portable 400Ws AC/DC strobe with under a second recycle speed at full power that offers an impressive 480+ full-power flashes per charge. The lightweight FJ400 offers unrivaled performance with the most accurate color temperature throughout its entire 9-stop output range.

  • 400 watt-second AC/DC strobe
  • Universal radio trigger for many Canon, Nikon, Sony (with adapter), Fuji, Panasonic Lumix, and Olympus cameras and Canon RT flash systems (see compatibility chart)
  • 480+ full-power flashes per charge
  • 0.05 to 0.9 second recycle time
  • Removable AC/DC lithium polymer battery
  • Color temperature stability of 5500K (±150K) across entire energy range
  • High-Speed Sync up to 1/8000s, TTL, and Rear Curtain Sync capable
  • Continuous Capture up to 20 frames per second
  • 6 groups and 16 wireless channels
  • 9 F-stop energy range in 0.1 and 1.0 increments

TTL, High Speed Sync, Freeze Sync, and More
With an intuitive menu system and LCD color display, the FJ400 features Manual and TTL Flash Modes, High Speed Sync (HSS) up to 1/8000s, Freeze Sync up to 1/19000s, Continuous Capture up to 20 fps, Mask Function, Delay Function, Automatic Memory Recall, Rear Curtain Sync, Canon RT flash compatibility, group and channel assignment, Group Exposure Compensation, and much more. This strobe is firmware upgradeable via the included USB-C cable.

Say Goodbye to Brand Specific Triggers
Integrated with a FJ Wireless Flash System receiver, the FJ400 strobe provides unrivaled features including multi-brand camera compatibility and High Speed Sync (HSS), TTL, and more when paired with a FJ-X2m Universal Wireless Trigger or the FJ80 Universal Touchscreen Speedlight. These wireless transmitters easily mount to a camera's hot shoe and are compatible with most Canon, Nikon, Sony (with adapter), Fuji, Panasonic Lumix, and Olympus cameras. The strobe can also be controlled by a Canon RT transmitter.

Unrivaled Battery Performance
The removable lithium polymer battery provides both DC power for on-location freedom and AC trickle-charge performance when the state of charge is above 25%.

Consistent Color Temperature at Every Power Level
The FJ400 maintains a color temperature stability of 5500K (±150K) throughout its entire 9-stop output range, with flash increments of either 0.1 or 1.0 stops. It features a 20W 5600K LED modeling lamp with auto-adjust and independent output control.

Optimized for Light Modifiers
The extended flash tube provides optimal light output allowing for a wider, even spread for filling light modifiers. Equipped with a Bowens S-Type mounting system, the FJ400 is easy to pair with your favorite softbox. The FJ400 includes a Magnetic 5” Reflector, Magnetic CCT Gel Set (CTO, 1/2-CTO, Window Green, Diffusion, Gel Frame), and a Rapid Box Switch Bowens Insert that allows you to pair your strobe with any Rapid Box Switch light modifier. The built-in tilter bracket with a tension screw offers secure mounting and positioning of large umbrellas and modifiers.

Designed with Safety In Mind
The FJ400 strobe is equipped with onboard self-monitoring cooling fans and an automatic shutoff feature to ensure safe operation during use.

Quick and Compact Rapid Box Switch Softboxes 
Constructed with solid aluminum umbrella-inspired framework, the design of the included Rapid Box Switch maximizes durability, minimizes weight, eliminates the need for separate support rods, and makes setup a breeze. Everything is simple, quick, and compact.

Store and Transport Your Strobe Kit with Ease
Equipped with a large, central storage compartment featuring removable dividers, the included backpack is ideal for traveling comfortably with your FJ400 gear. It features various zippered compartments for storing smaller accessories, a separate internal compartment with three padded sleeves for storing laptops and tablets, a convenient water bottle pouch, a tripod holder with retention straps and more.

FJ-X2m Camera Compatibility
The FJ-X2m trigger is compatible with any camera that has a hot shoe mount in manual mode. The following cameras provide TTL and HSS compatibility using the latest firmware update. Additional camera models are likely compatible, and will be added to this list as they are tested and confirmed.

*Compatible camera with minor HSS, TTL, and/or performance limitations that can often be offset with adjustments within the camera and/or FJ Wireless equipment settings.

What's In the Box:

  • 1 × FJ400 Strobe
  • 1 × FJ400 AC/DC Lithium Polymer Battery
  • 1 × J400 Glass Dome (Gen 1, 3-Tab)
  • 1 × FJ400 AC Power Adapter & Cord (US/CA Plug)
  • 1 × FJ400 55-Degree Magnetic Reflector (FJ400/Bowens/Godox Mount)
  • 1 × FJ400 Magnetic Gel Set (5.5" CTO, 1/2-CTO, Window Green, Diffusion, Gel Frame)
  • 1 × FJ-X2m Universal Wireless Flash Trigger
  • 1 × USB-C To USB-A Cable
  • 1 × Rapid Box Switch Octa-S
  • 1 × Rapid Box Switch Insert (FJ400, Bowens, Godox)
  • 1 × Lite Traveler Backpack


Glazer's SKU 81143
Manufacturer Westcott
Product Specs


FJ400 Strobe

Maximum Power400 Ws
Energy Range9 F-Stop (1.56 - 400 Ws)
Flash Duration (t0.1)Normal: 1/280 - 1/3000s
Freeze: 1/280 - 1/7000s
Flash Duration (t0.5)Normal: 1/800 - 1/8500s
Freeze: 1/800 - 1/19000s
Recycle Time0.05 - 0.9s
Continuous Capture20 FPS (Camera Model Dependent)
Color Temperature StabilityNormal/TTL/HSS: 5500K ±150K
Freeze: 5500K ±500K (E.R. 5-9)
Mounting SystemBowens S-Type
Flash Increments0.1-Stop and 1-Stop
Flash ModesManual, TTL
Mask FunctionYes (Manual)
Flash Exposure Compensation±3
Modeling LampLED 20W 5600K ±200K
Sync FunctionsHSS, Normal (Front & Rear Curtain), Freeze
Sync Speed1/8000s (High-Speed)
Wireless Radio Frequency2.4 GHz
Wireless Channels32 (AU, 01-31)
Wireless Groups16
Wireless Range985’ (300m)
DisplayLCD Color Display
MountBuilt-in Tilter; 5/8” / 16mm Receptacle
CoolingSelf-Monitoring Cooling Fans
Voltage StabilizationYes
Port TypeUSB-C for Firmware Updates (PC, Mac)
Auto-Power OffYes
Audible BeepYes
Delay FunctionYes (Manual)
Auto Memory RecallYes


FJ-X2m Trigger


Compatible FlashesFJ400, FJ200, FJ80, Canon RT
Compatible CamerasCanon, Nikon, Sony (with adapter), Fuji, Panasonic Lumix, Olympus
Radio Frequency2.4GHz
Wireless Channels32 (AU, 1-31)
Wireless Groups6 Native, 10 App
Wireless Range985’ (300m)
Canon ID100 keys (00-99, RT only)
Control ModesTTL (Auto), Manual
TTL EV Range±3
Sync FunctionsHSS (Up to 1/8000s), Normal (Front & Rear Curtain)
Standard Flash SyncCamera Model Max Sync Speed
PortsUSB-C (Firmware Updates); 2.5mm (Output only)
Mobile AppYes
Firmware UpdatePC, Mac
BatteryBuilt-in Rechargeable Lithium Ion


FJ400 Battery


Flashes Per Charge480+ at Full Power
Battery TypeAC/DC Lithium Polymer
Capacity65Wh, 4400mAh
Battery IndicatorLED
Recharge Time2.5 Hours
Battery Charge Cycles300+
AC Power RequirementBattery Level ≥25%


Technical Specs


WIDTH13.0" / 33.0 cm
HEIGHT8.5" / 21.6 cm
WEIGHT12.5 lbs. / 5.7 kg
INPUT POWER100-240 VAC, 50/60 Hz, 1.6A
OPERATING TEMP.14° to 104° F / -10° to 40°C
USBUSB-C (Firmware Updates)



7.75 ft.
CERTIFICATIONFJ400: CE; Power Adapter: CE, FCC; Battery: CE


MOUNT TYPE5/8” Receiver, 8mm Round Umbrella Receptacle (Limited Mounting with Hexagonal Shaft Umbrellas)