Fangrui Product Details Flash Exposure Control Ttl Autoflash:ttl Manual Flash:yes Stroboscopic Flash:yes Function High-speed Sync:yes Second-curtain Sync:yes Flash Exposure Lock:yes Focus Assist:yes Modeling Lamp:control The Modeling Lamp By The Flash Trigger Beeper:control The Beeper By The Flash Trigger Wireless Setting:the Receiver End Can Control The Camera Through The 2.5mm Sync Cord Jack Zoom Setting: Adjust The Zoom Value By The Transmitter Tcm Function:transform The Ttl Value Into The Output Value In The M Node Firmware Upgrade:upgrade Through The Type-c Usb Port Memory Function:settings Be Stored 2 Seconds After Lasht Operation And Recover After A Restart Wireless Flash Transmission Range: 0-100m Built-in Wireless:2.4g Modulation Mode:msk Channel:32 Wireless Id:01-99 Group:16 Colour:black Material:plastic Type:c: -s For Package Contents: 1 X Trigger(due To Different Product Batches, The Appearance , Which Does Not Affect The Use) Only The Above Package Content, Other Products Are Not Included. Note: Light Reflectio