Fomito Godox TT685N I-TTL II 2.4GHz Wireless Master / External Camera AutoFlash Speedlight & X1T-N Transmitter Trigger HSS for Nikon D810 D800E D7200 D60 D5500 DSLR Cameras, SB900 SB910 flashes Radio Master & Slave Modes built-in Godox 2.4GHz X Radio System. With Godox X1T-N TTL Transmitter on camera, trigger perfectly TT685N flash, range to 100 m. GN60, HSS to 1/8000s, 1/128  1/1 output control (1/3rd increments). Optic Master & Slave Modes for Nikon Optic Wireless System. X1T-N provides a full group style interface allowing up to 5 groups to be individually set to either TTL, Manual, or Off.