【Support YN622 communication mode and YN560 RX communication mode】New upgrade version YN622C II can set to "622" or "560-RX" communication mode through the power switch, supports receiving the trigger signal of the YN560-TX, RF605(603 mode), RF603(II) series products, with multi aspects improved, equipped with quick lock design and supports USB firmware upgrade. | 【1/8000s HSS, TTL, M, Multi mode】Remotely change the modes and parameters of the flash quickly when using the C's series DSLR cameras which supports external flash function , such as TTL ratio or manually set each group of flash output. Support high-speed sync, the max sync speed is 1/8000s, Support ETTL, Manual and Multi flash modes. Support TTL flash installing on the top of transmitter. | 【Remote control reaches 100M, 7 wireless channels and A/B/C three groups】YN622C II TTL wireless flash trigger is a high performance master and slave equipment of multiple flashes photography, through digital FSK 2.4GHz radio wireless transmission, and different photographic effects can be realized through setting your flash at 360 degrees. It design of transceiver, the distance of remote control reaches 100M, supporting 7 wireless channels and A/B/C three groups. | 【Manual mode】You can use YN-560TX, RF-603 II, RF-605C as transmitter, and use YN-622C II as receiver. It supports 622C communication mode ( YN-622C and YN622C-TX) and ( RF-605C, RF-603 II and YN560-TX ). | 【TTL mode】You can use YN622C II, YN622C, and when you use it with YN622C TX, it can be used as receiver. | 【Additional Function】It supports USB Firmware upgraded. 1st curtain, 2nd curtain, Flash Exposure Compensation (FEC), Support Flash Exposure Bracketing (FEB), Support Flash Exposure Lock (FEL), Support flash zooming (auto, manual), Support AF assist beam emitter(AF Lamp).