Godox TT685N TTL 2.4GHz GN60 HSS High-Speed Sync 1/8000s Flash Speedlite Light Compatible for Nikon Cameras I-TTL II auotflash GN60 (m ISO 100, @200mm). 22 steps from 1/1 to 1/128. Stable consistency and color temperature with good even lighting. Godox TT685N Speedlite Fully Support Nikon i-TTL II camera flash. Workable as Master or Slave unit in a wireless flash group. 3. Use dot-matrix LCD panel to make clear and convenient operations. With built-in 2.4G wireless flash transmission and TTL compatible flash, your shooting will become simpler. Use dot-matrix LCD panel to make clear and convenient operations. Support with firmware upgrade. Godox TT685N Flash Duration: 1/300 to 1/20000 seconds. Sync mode: High-speed sync (up to 1/8000 seconds), first-curtain sync, and second-curtain sync.