Product description More Feautures FE lock 11 Customizable Functions Manual Flash 1/1 - 1/256 Power Modeling Light Status Control Adjusts the Flash Zoom Coverage for Each Group Selective Transmission of Data Conserves Energy and Battery Life Magnification Function Displays Details of Each Group Settings Global Adjustments to Exposure Values for Multi-Group in M Mode 5 Group Buttons and 4 Function Buttons Offer Convenient Manipulation Support Type-C USB Firmware Upgrade and Wireless Triggering by 2.5mm Sync Cord Jack Compatible Camera: Fuji series cameras (TTL autoflash)Support for the cameras that have PC sync socket. Flash Exposure Control .