The YN622N II i-TTL wireless flash trigger is a high performance master and slave unit that allows the use of multiple flashes through digital FSK 2.4GHz radio wireless transmission, allowing different different off-camera flash setups to be accomplished. The distance from the remote control unit reaches up to 100m, supporting 7 wireless channels and 2 groups.
You can remotely change the modes and parameters of the flash quickly when using DSLR cameras which support an external flash function , such as TTL ratio, or manually set each groups flash output. The YN622N II also supports high-speed sync, with a max sync speed is 1/8000s, support i-TTL, Manual and Multi flash modes.
The YN622N II can be set to "622" or "560-RX" communication mode through the power switch, and also supports receiving the trigger signals from the YN560-TX/RF605(603 mode)/RF603(II) series products. The YN622N also features multiple improvements over the previous generation, coming equipped with a quick lock design and support for USB firmware upgrades.