Fomito Godox TT685N I-TTL II 2.4GHz Wireless Master / External Camera AutoFlash Speedlight HSS for Nikon D810 D800E D7200 D7100 D750 D610 D60 D610 D5500 D5300 D3300 DSLR Cameras, SB900 SB910 flashes Radio Master & Slave Modes built-in Godox 2.4GHz X Radio System. GN60, HSS to 1/8000s, 1/128  1/1 output control (1/3rd increments). Optic Master & Slave Modes for Nikon Optic Wireless System. Compatible with Godox X1T-C, X1T-N, X1T-S, TTL Transmitters, and X1R-N Receivers 3 Remote Groups A / B / C, 32 Channels, Range to 100 m.