I had the time being 4 Standard transceiver YN622 by Yongnuo and came with the controller via a not quite clear, since there was no reasonable guide to this. Now the flash control came out and I bought me the same. She needs no manual (which does not mean that this time even a good guide in German was there!), Because it is self-explanatory and works flawlessly! The transmitting power is enormous even by reinforced concrete without any errors! What is perhaps important to know that you want to set the flashes in the output with the flash control, lightning needs which also have TTL, otherwise they are not set by control and you have to directly go to the Lightning to adapt it in the performance.
Conclusion: I would and have this kind of receiver (YN622) and flash control (YN622N) has repeatedly recommended and would do it again and again! For this price you get on the complete market unlike anything good!