The YN-622C-TX combines with the popular YN-622C TTL triggers to provide a much faster and more convenient user interface on the camera than the Canon Flash Control menu. It's also importantly allows remote manual and TTL groups to be mixed together and used at the same time.

FEATURES

• 3 Groups
• Mix TTL, Remote Manual, and SuperSync Groups
• Individual 1/3rd stop Manual Power and FEC adjustment
• Remote Flash Zoom in 3 groups, and Auto Zoom
• 2nd Curtain Sync, HSS, SuperSync
• USB port for Firmware Updates
• AF Assist Light
• Remote Shutter Release Function
• Dedicated Buttons for Fast Adjustments
• Battery Level Indicator
• PC Sync Port
• 7 Channels
• Improved Stability and Transmission Speed
• SuperSync Manual Timing Adjustment
• Flash Exposure Lock Function (FEL)
• Modeling Flash & Red-Eye Reduction flash
• Settings Saved Automatically
• PC Port Input
• Up To 100M Range
• Basic Trigger Mode for Non-Canon Cameras (with standard hotshoe, max  sync speed is 1/250s)
• Remote Manual Power Control using Non-Canon Cameras (requires EX II compatible flashes)
• EX Flash Compatible Mode – Now Allows remote manual power levels with EX
• Mark One flashes