About this itemTTL WIRELESS TRANSMITTER: Multi-Channel Triggering, Stable Signal Transmission, and Sensitive Reaction2.4G WIRELESS TRANSMISSION: X1T-F Transmitter can Remotely Control Godox Flashes which have Built-in 2.4G Wireless X SystemFULLY SUPPORTING TTL FUNCTIONS: TTL Autoflash, 1/8000s High-Speed Sync, Second Curtain Sync, Flash Exposure Compensation, Modeling Flash Control, etcWIRELESS CONTROL and GROUPING SYSTEM: GR Group Flash and Wireless Grouping System(Max.5 Groups & 32 Channels)VERSATILE FUNCTIONS: Synchronization Delay Setting, Wireless Shutter Release, Zoom Setting, C.Fn Custom Functions, etcBuilt-in 2.4G Wireless TransmissionWith in Built-in 2.4G wireless transmission,X1T-F transmitter can remote control the Godox flashes which has built-in 2.4G wireless X system.when using in combination with XTR-16 or XTR-16S receiver,X1T-F transmitter can remote the Godox flashed which do not have built-in 2.4G wireless X system.