Laowa Macro Twin Flash KX-800 The Venus Optics KX800 Flexible Macro Twin Flash Kit is specially designed for close up and macro photography. It is a manual flash with controllable output settings. It features a combined guide number of 190 (in feet) with 8 levels of power adjustment. Powers can be adjusted independently in the left and right flash and the LED focussing / fill light. The high output makes it extremely handy for macro photographers who shoots under small aperture and high magnification ratio. Quick recycle time (2 sec) also helps in fast shooting. The Macro Twin Flash is built with two 48cm long flexible arms plus a LED flexible arm. This gives photographers complete flexibility to position the flash for the best possible performance. A LED focusing light aids focus assistance. The whole system weighs just 450g, making it a very portable. Uses 4x AA batteries. Compatible with Canon, Nikon, Pentax, MFT (Panasonic / Olympus) Samsung NX, Sony E, Sony A, for some Sony A / E mount require an flash shoe adapter).