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 mitter TCM function: form 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 mission range: 0-100m Built-in wireless:2.4G Modulation mode:MSK Channel:32 Wireless ID:01-99 Group:16 Colour:Black Material:plastic type:A: -C 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 reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.