Yongnuo YN-622N, Yongnuo YN-622N YN 622 Wireless I TTL ITTL HSS 1/8000S Flash Trigger for Nikon DSLR 2 Transceivers Compatible flash mode: i-TTL, Manual flash Compatible Shutter sync: front-curtain sync, rear- curtain sync and high-speed sync(HSS/FP), the highest sync speed is 1/8000s* Support remote set the parameters of flash through the transceiver (Remote Control Mode) Support i-TTL/Manual/Repeating flash mode mix using(Mix Control Mode) Support the flash installed on transmitter(on-top flash)and supports i-TTL function