Godox AD400 Pro is a 400 Ws battery-powered portable studio flash designed for portrait, fashion, still life, event, commercial, and outdoor photography. It integrates the 2.4 GHz Godox X radio system, compatible with dedicated triggers for Canon, Nikon, Sony, Fujifilm, Olympus/Panasonic, and other supported systems, allowing wireless control of power, TTL, and HSS. Power is adjustable from 1/256 to 1/1 across 9 stops, with high-speed sync up to 1/8000 s and recycle times ranging from approximately 0.01 to 0.9 seconds. The 21.6 V 2600 mAh lithium-ion battery provides up to about 390 full-power flashes, making the flash suitable for location sessions without mains power. The stated color temperature is 5600K ±200K, with a Stable Color Temperature mode that keeps variation within ±75K across the full power range, useful for work where color consistency between shots is important. The flash includes a 30 W LED modeling lamp, S1/S2 optical modes, stroboscopic function, proprietary Godox mount, and an included Bowens adapter for use with softboxes, reflectors, and other compatible modifiers. The body weighs approximately 2.1 kg with the battery and maintains a more compact format than higher-output monolights. Godox AD400 Pro is suitable for photographers looking for a self-contained, powerful, and transportable flash light with wireless control, TTL/HSS compatibility, and good integration within the Godox accessory system.