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Westcott expands the FJ line by introducing the FJ400 II 400Ws Touchscreen Strobe with FJ Pro AC/DC Battery as the brand's fastest 400Ws monolight. The second generation of the FJ400 recycles in 0.01-0.9 sec ensuring speed and reliability while offering relevant upgrades. The FJ400 II brings improvements to its design with a 30W bi-color LED modeling light and a full-color OLED touchscreen for intuitive and uncomplicated onboard control. In addition to these upgrades, other settings are to be highlighted, including flash durations with a Freeze mode and a Creative Mask feature for better efficiency. Users will also benefit from flexible AC/DC power options with the included interchangeable FJ Pro battery that provides up to 550 full power flashes per charge. The FJ400 II is a compact and rapid strobe lighting solution with little weight at 5.3 lb for great portability.
Westcott expands the FJ line by introducing the FJ400 II 400Ws Touchscreen Strobe with FJ Pro AC/DC Battery as the brand's fastest 400Ws monolight. The second generation of the FJ400 recycles in 0.01-0.9 sec ensuring speed and reliability while offering relevant upgrades. The FJ400 II brings improvements to its design with a 30W bi-color LED modeling light and a full-color OLED touchscreen for intuitive and uncomplicated onboard control. In addition to these upgrades, other settings are to be highlighted, including flash durations with a Freeze mode and a Creative Mask feature for better efficiency. Users will also benefit from flexible AC/DC power options with the included interchangeable FJ Pro battery that provides up to 550 full power flashes per charge. The FJ400 II is a compact and rapid strobe lighting solution with little weight at 5.3 lb for great portability.
Power & Performance
The FJ400 II's 9-stop power range (1.56 - 400Ws) in 0.1 and 1.0 increments makes it readily adaptable to a variety of situations. The flash head is backed by a 1/24,000 peak action-stopping flash duration in Freeze mode, is capable of 50 fps (camera and power dependent), and supports high-speed sync up to 1/8000 second as well as front and rear curtain sync. Users can also adjust flash exposure compensation from -3 to +3 EV. The FJ400 II was designed to suit both studio and on-location shoots.
Creative Mask Mode
In addition to basic manual and TTL flash modes, other handy settings are available, such as the Westcott Creative Mask feature, a great asset for high-volume and fast-paced shoots. This functionality gives photographers the ability to create up to six lighting combinations without moving the fixtures. Thanks to the FJ400 II's touchscreen, users can easily control when each light fires in a sequence to capture multiple dynamic looks from a single setup.
Seamless Integration
The FJ400 II is part of Westcott's 2.4 GHz FJ wireless system, meaning it can work with all FJ triggers and flashes for a cohesive lighting ecosystem. Control your setup with an optional FJ-X trigger for compatibility with major camera brands. The Westcott StudioLink app also offers wireless adjustments and advanced functionality directly from your smartphone.
Wireless 2.4 GHz Radio Frequency
The flash head has an integrated 31-channel, 16-group, 2.4 GHz wireless radio frequency with a range of 328'. The wireless system prevents interference with other photographers or to shoot several individual setups.
Interchangeable Batteries
The FJ400 II runs on a powerful, removable 29.6V, 2500mAh AC/DC lithium-ion battery that will give you 550 full and thousands of low-power flashes on a 1.5-hour charge. The included FJ Pro battery has LED status indicators to keep you appraised of remaining power. Users can also decide to purchase the separately available FJ ProMax battery with higher capacity to achieve up to 1000 flashes at full power. The FJ400 II's shared battery compatibility with the FJ800 unit eliminates the need for multiple power solutions, while a convenient AC trickle-charge functionality ensures uninterrupted performance during extended sessions.
30W Bi-Color LED Modeling Light
An upgraded 30W LED modeling light is employed with bi-color adjustability from 2700 to 6500K, which allows easy framing and composition.
Mounting & Firmware Updates
This monolight has a Bowens S front and comes with a 5/8" tilting bracket to mount on separately available light stands, as well as a 9mm umbrella receptacle. Also, a USB-C port is present for firmware updates.
Essential Accessories
The FJ400 II ships with a magnetic 5.5" reflector with a gel set (CTO, 1/2-CTO, window green, and diffusion). An insert is also included to allow use of optional Westcott's Rapid Box Switch softboxes. A carry case is provided for storage and transport.
Other Details
Consistent 5500K (±150K) color temperature
Extended user-replaceable flash tube for a wide and even light spread
IGBT+ technology for expanded camera compatibility and enhanced flash performance
Self-monitoring cooling system
Voltage stabilization
UPC: 810164330932
Westcott FJ400II Specs
Key Specs
Item Type
1x Monolight
Includes Flash Tube
Yes
Included Light Modifier
1x Reflector
Included Storage Case
Yes
Power Range
400 Ws
Power Control
9-Stop Range
Recycle Time
0.01 to 0.9 Sec
TTL Metering
Yes, via Non-Included Transmitter (Canon E-TTL / E-TTL II, FUJIFILM TTL, Nikon i-TTL, Sony ADI / P-TTL)
1x Rechargeable Lithium-Ion, 29.6 VDC, 2500 mAh, 74 Wh (Included) • 550 Flashes at Maximum Brightness • 1.5-Hour Charge Time
Battery Charging
AC to DC Adapter (Included)
Included Adapter / Cable
Yes
Mounting
Fixture Mounting
1x 5/8" Receiver
General
Display
Touchscreen OLED
Dimensions
9.25 x 6.7 x 4.4" / 23.5 x 17 x 11.2 cm (Fixture with Battery)
Weight
5.3 lb / 2.4 kg (Fixture with Battery)
Packaging Info
Package Weight
10.96 lb
Box Dimensions (LxWxH)
13 x 11.4 x 7.5"
Westcott FJ400II Reviews
Miss the handle design
By Pravali
Rated 4 out of 5
Date: 2026-07-09
If this model have a handle that would be so easy to carry around bcoz of weight . Otherwise I love everything about it
Impressed
By Lloyd
Rated 5 out of 5
Date: 2026-03-18
Played with it for a few days and I'm currently loving it more than the ones I currently. I'm still learning the function, but I know I will benefit from what it has to offer.
See any errors on this page?
Can I used with an AC power cord?
Can I used with an AC power cord?
Asked by: Rafael
Yes, you can use the Westcott FJ400 II 400Ws Touchscreen Strobe with FJ Pro AC/DC Battery on AC via the AC power cord that is provided.
Answered by: Davis H
Date published: 2025-08-14
Anyone know if the FJ 400 II is compatible with ...
Anyone know if the FJ 400 II is compatible with Fuji XT5?
Asked by: Thi
The Westcott FJ-X3 M Universal Wireless Flash Trigger is equipped with multi-brand technology that pairs with most camera brands to trigger the FJ Wireless and Canon RT devices. This 2.4 GHz remote offers revolutionary compatibility with many Canon, Nikon, Sony (with adapter), FUJIFILM, Panasonic Lumix, and Olympus cameras.
Answered by: Davis H
Date published: 2025-06-05
Does this have a standard sync port so I can use ...
Does this have a standard sync port so I can use a different receiver like a PocketWizard?
Asked by: Heather
The Westcott FJ400 II 400Ws Touchscreen Strobe with FJ Pro AC/DC Battery (B&H# WEFJ400IITSS) has a standard 3.5mm sync port that may be connected to many brands of radio receivers such as the PocketWizard PlusX Transceiver (B&H# POPWPX). Of course, only appropriate Westcott transmitters such as the Westcott FJ-X3 M Universal Wireless Flash Trigger (B&H# WEFJX3MWFT) whose signals are received by the FJ400 II's own internal receiver will support TTL, HSS, and remote intensity adjustments.
Answered by: Yoni S
Date published: 2025-12-03
Does this still offer Canon RT in addition to the ...
Does this still offer Canon RT in addition to the Westcott Canon (so I can also include Canon speedlites in a setup)?
Asked by: Patrick
The Canon RT frequency has become overcrowded in the last few years and Canon has not been able to provide a stable frequency for communication, leading to missed shots and connection loss. Therefore, for best performance we recommend either the FJ80 II or FJ80 SE Speedlights.
Answered by: FJ Westcott
Date published: 2025-01-29
Does the FJ 400ii have a freeze mode?
Does the FJ 400ii have a freeze mode?
Asked by: Daniel
Yes, the monolight strobes in the Westcott FJ400 II 400Ws Touchscreen Strobe with FJ-X3 M Universal Trigger (2-Light Backpack Kit) have a Freeze Mode feature. As indicated on page 15 of the instruction manual, when you are on the [MENU 2] screen, under the [SYNC] tab will be the option to set the monolight to [Freeze Mode], which allows you to capture fast-moving subjects with an ultra-short flash duration to stop motion effectively. Do note this is only available in Manual Mode only.
