I very disappointed, I have a Nikon D800 and Nikon SB600 flash Yongnuo a Yn + 622N kit and obviously no communication passes from the test and triggering the flash, but when I make the settings with the Yongnuo tx and although nothing happens on my flash, this case does me nothing more :( no documentation in French not even on the site Yongnuo is disappointing really ...... pathetic.