Godox TT685N:GN60 (m ISO 100, @200mm). 22 steps from 1/1 to 1/128. Stable consistency and color temperature with good even lighting.Fully support Nikon DSLR cameras and is well compatible with E-TTL II autoflash. Workable as Master or Slave unit in a wireless flash group.With built-in 2.4GHz wireless remote system to support transmitting and receiving. Provided multiple functions, include HSS (up to 1/4000)etc.Use dot-matrix LCD panel to make clear and convenient operations. Support with firmware upgrade.Flash Duration: 1/300 to 1/20000 seconds. Sync mode: High-speed sync (up to 1/4000 seconds), first-curtain sync, and second-curtain sync.