Compatible with SONY DSLR Cameras with MI Shoe e.g. A77II, A7RII, A7R, A58, A99, ILCE6000L, etc. Support GR group flash, max.5 groups & 32 channels. Fully Support TTL autoflash, 1/8000s High-speed Sync, Second Curtain Sync, Flash Exposure Compensation, Flash Exposure Lock, Modeling Flash Control, etc. X1S transmitter can remote control the Godox Flashes wich has built-in 2.4G wireless X system. When using in combination with XTR-16 or XTR-16S receiver, X1S transmitter can remote control the Godox flashes wich do not have built-in 2.4G wireless X system. Big and clear LCD panel offers convenient operation. Support USB firmware upgrade. Versatile functions such as synchronization delay setting, wireless shutter release, zoom setting, C.Fn custom functions, etc.