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Westcott FJ400 400Ws Strobe with AC/DC Battery
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Westcott FJ400 400Ws Strobe with AC/DC Battery

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4 Day Rental Price:



*up to 2nd day air - overnight available

The Westcott FJ400 400Ws Strobe with AC/DC Battery is a versatile, feature-rich, battery-powered flash with a quick recycle time. Key features include:

  • 9-stop power range; multiple sync modes

  • 0.05- to 0.9-second recycle time

  • Multi-brand wireless radio receiver

  • Magnetic reflector included

Versatility. The Westcott FJ400 400Ws Strobe’s nine-stop power range, High-Speed Sync, Rear-Curtain Sync, and TTL capabilities mean you can use it in a broad range of shooting situations. It boasts a 0.05- to 0.9-second recycle time, which is lightning fast for a battery-powered flash. A 20 W LED modeling light keeps power drain to a minimum.

Broad Wireless TTL Compatibility. The FJ400’s built-in TTL receiver is compatible with many Canon, Nikon, Fuji, Panasonic Lumix, Olympus, and Sony (with a separately available adapter) cameras, as well as the Canon RT flash system. If you’re using the separately available FJ-X2m Universal Flash Trigger, you can adjust power and exposure compensation from up to 985 feet away. The wireless system gives you six groups with sixteen channels for shooting several individual setups and to prevent interference with other photographers.

Powerful, Rechargeable Battery. The included rechargeable lithium-ion battery gives you up to 480 full-power charges on a 2.5-hour charge. The battery has LED charge-status lights to keep you aware of its remaining power, and the 20 W LED modeling light keeps power drain to a minimum.

Modifier Compatible. This light features a Bowens mount design that is compatible with our various Bowens-mount modifiers.

Q & A

Unsure if the Westcott FJ400 strobe system will work for you?

  • Westcott has a pretty good ongoing Q&A section that covers some of the more specific features and what they can do. We strongly recommend checking this invaluable resource if you still are not sure if this strobe works for your needs.

I read this thing works with the Canon RT system. How does that work?
  • If you are invested in the Canon RT flash system, you can also trigger the FJ400 strobe using one of their Canon ST-E3-RT Speedlite Transmitters or Canon Speedlite 600EX II-RT.

  • Do note there are functionality limitations when using the Canon RT system as the trigger. You can find more information on these limitations, as well as detailed setup instructions, here-.

How is this strobe triggered?
  • Out of the box, we include a 15-foot 1/8" mini to PC Sync cable for triggering the FJ400.

  • If you’re looking to work wirelessly, we also offer the FJ-X2m Universal Flash Trigger as a separate rental item.

Do you include the magnetic gel set?
  • No! We do not send the magnetic gel set by default.

  • If you would like them sent, you can request so in a note during checkout.

Accessory Type

Bowens S Type



Color Temperature

5500K ± 150K

Exposure Control

TTL (via Additional Equipment)

Flash Duration

1/19,000 Sec

Flash Modes

Hi-Speed Sync, Second-Curtain Sync, Stroboscopic

Flash Ready Indicator


Item Type


Lighting Type

Strobe Lighting

Maximum Power

400 Ws

Modeling Light Type


Modeling Light Wattage

20 W


5/8" Receiver


5.5" / 13.97 cm Changeable

Sync Type

Button, Cable, Radio

Wireless Communication Channels


Wireless Groups


Wireless Range

985’ / 300.2 m (Radio)

Westcott FJ400 400Ws Strobe with AC/DC Battery

AC Adapter - Westcott FJ400 Strobe (4703 16.8V/2A)

Case - Westcott FJ400 Carry Case

Charger - Non-Polarized Cable

Strobe Accessory - Westcott FJ400 65Wh Battery (4702)

Strobe Accessory - Westcott FJ400 Magnetic 5.5" Reflector

Strobe Accessory - Westcott FJ400 Protective Dome Cover

Strobe Trigger - PC to Mini 1/8" 15ft