Background and backlight/hairlight from one flash unit!

-Adjustable light distribution

-Two filter slots, one for each output

-2 beams, avoid unwanted reflections from the surroundings

Comparison: orange filter left side, photographed against a white background

Without Dualflash

 

The color is mixing with natural light from the right side of the flash.

This mixture will bounce, causing unwanted reflection from the surroundings and can introduce

color casts.

With Dualflash

 

The spread is controlled, color temp for each output is accurate.

The 2 beams are hitting the target, avoiding reflections.