Godox TT685N Speedlite Flash Kit with I-TTL Autoflash for Nikon DSLR Camera D800 D700 D7100 D7000 D5200 D5100 D5000 D300 D300S D3200 D3100 D3000 D200 D70S D810 D610 D90 (Flash Only) 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 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 2.4GHz wireless remote system to support transmitting and receiving. Provided multiple functions, include HSS (up to 1/80 )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 1/8000 seconds), first-curtain sync, and second-curtain sync.