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High-Power Battery Monolight for Location Flash
The Geekoto GT400 is a 400Ws battery-powered monolight built for photographers who need stronger portable strobe output for portraits, events, commercial work, and location lighting.
Built-In Wireless Receiver and Commander Workflow
The GT400 includes an internal wireless receiver and is designed to be controlled with the Geekoto Commander Trigger. This compatibility detail needs to be stated clearly so customers do not buy the wrong transmitter.
Modifier-Ready with Bowens Adapter
The included Bowens front accessory adapter lets photographers use Bowens-compatible modifiers, making the GT400 easier to build into a serious portrait and location-lighting kit.
Modeling Light and Optical Triggering
The GT400 includes a 10W LED modeling lamp and S1/S2 optical triggering, giving photographers more flexibility when building multi-light setups.

GT400 400Ws Battery-Powered Monolight Flash
Geekoto Technology
- Regular price
- $ 389.99
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The Geekoto GT400 is a 400Ws battery-powered monolight flash for photographers who need stronger portable strobe power, a 10W LED modeling lamp, Bowens accessory compatibility, and Commander trigger control.
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High-Power Battery Monolight for Location Flash
The Geekoto GT400 is a 400Ws battery-powered monolight built for photographers who need stronger portable strobe output for portraits, events, commercial work, and location lighting.
Built-In Wireless Receiver and Commander Workflow
The GT400 includes an internal wireless receiver and is designed to be controlled with the Geekoto Commander Trigger. This compatibility detail needs to be stated clearly so customers do not buy the wrong transmitter.
Modifier-Ready with Bowens Adapter
The included Bowens front accessory adapter lets photographers use Bowens-compatible modifiers, making the GT400 easier to build into a serious portrait and location-lighting kit.
Modeling Light and Optical Triggering
The GT400 includes a 10W LED modeling lamp and S1/S2 optical triggering, giving photographers more flexibility when building multi-light setups.

Key features:
- 400Ws monolight flash output
- Battery-powered design
- Built-in wireless receiver
- Only compatible with Geekoto Commander Trigger
- 10W LED modeling lamp
- S1/S2 optical trigger
- Bowens front accessory adapter included
- Waterproof carrying case included
- Up to 350 full-power flashes per charge
- Flash duration from 1/312s to 1/5260s
- Multi Flash up to 40 sequential flashes
- TTL metering
Technical Specifications:
-Model GT400
-Product Type Battery-Powered Monolight Flash
-Flash Power 400Ws
-Power Control 7-stop range
-TTL Metering No
-Recycle Time 0.1s-2.5s
-Full-Power Flashes Up to 350 per charge
-Wireless Control Built-in wireless receiver
-Compatible Trigger Geekoto Commander Trigger only
-Optical Trigger S1/S2
-Modeling Light 10W LED built-in
-Flash Duration 1/312s-1/5260s
-Multi Flash Up to 40 sequential flashes
-Front Mount Bowens front accessory adapter included
-Power Source Built-in rechargeable battery and AC powered
What's Included
- 1 x Geekoto GT400 400Ws monolight
- 1 x Bowens front accessory adapter
- 1 x Waterproof carrying case
- Charger/power cord, protective cap, AC power cord
- Commander Trigger sold separately unless bundled
FAQ
Q: Does the GT400 work with the C1-PRO transmitter?
A: Do not publish that unless verified. The current product page says this model is only compatible with the Geekoto Commander Trigger.
Q: Does the GT400 support TTL?
A: No
Q: Does it include a Bowens adapter?
A: Yes
Q: How many full-power flashes does it provide?
A: The current Geekoto page lists up to 350 full-power flashes from a full battery charge.
Q: Is the GT400 best for portraits?
A: Yes. It is a strong fit for portraits, commercial work, events, and location lighting where 400Ws battery-powered output is useful.
Q: What is this compatible with?
A: Compatible with supported Geekoto wireless flash transmitters and compatible studio modifiers. Use proper stands, sandbags, and approved batteries or chargers for this flash.