The Powerextra DF-400 speedlite features a guide number of 33 (ISO 100/1m) and supports manual mode, S1 and S2 wireless flash trigger modes, as well as a single-contact hot shoe. It boasts a vertical rotation angle of 0~90 degrees and a horizontal rotation angle of 0~270 degrees, making it compatible with a wide range of Canon, Nikon, Panasonic, Olympus, Pentax, Fujifilm, and Sony cameras with Mi hot shoes, such as the a9, a7, a7II, a7III, a7R III, a7RII, a7SII, a6000, a6300, and a6500. However, it is not compatible with Canon EOS Rebel SL3/250D, Rebel T7/1500D, 2000D, Rebel T100/3000D, 4000D, or Sony A Series DSLRs.

The flash unit features 8 levels of power output control, indicated by 8 LED lamps, and is powered by 4 AA-size batteries. It also provides a PC port, allowing for synchronous flash operation by connecting to the port. The flash recycle time is approximately 3.0 seconds, and it includes a power-saving automatic shutdown function and an automatic save function. To test the flash, simply press the test button, and it will fire with the current mode settings.

The package includes the Powerextra DF-400 speedlite, a protective bag, a mini stand, and an instruction manual.

Powerextra is a brand that values stability, security, and compatibility, and its products have earned a solid reputation and significant sales volume due to their advanced technology. Powerextra's products fully comply with original equipment manufacturer (OEM) standards, ensuring quality and reliability.

In addition to the DF-400 speedlite, Powerextra offers a range of other photography accessories, including the 2.4G Wireless Flash, the 2.4G LCD Wireless Flash, the Lens Pouch Bag, and the Waist Strap Belt. These accessories are designed to enhance the photography experience and provide users with the tools they need to capture life's moments.

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