Godox TT600S Thinklite Camera Flash Built-In 2.4G Wireless X System with Master and Slave wireless System for Sony Multi Interface MI Shoe Cameras + X1TS Transmitter + 3PCS EACHSHOT Diffusers Built-in Godox 2.4G Wireless X System Optical & 2.4G wireless transmission offer even and stable output. With built-in Godox 2.4G wireless X system. TT600S is compatible with AD360II-C, AD360II-N, TT685C, TT685N, TT685S, X1T-C, X1T-N, X1T-S etc.