Buy on Amazon : br br YONGNUO YN-622C-TX YN622C-TX Wireless TTL Flash Controller Transmitter with LCD Display working br br Wireless TTL Flash Controller Transmitter with LCD Display working with HSS Full Function for Canon br High-speed Synchronous and Remote Control Function br Max Sync Speed 18000s br GR E-TTL II Manual Super Sync E-TTL ii Multi mode br Syne mode 1st-curtain 2nd-curtain Hi-speed sync Auto FP