Godox TT685C Speedlite Flash with E-TTL II Autoflash for Canon EOS 5D Mark III 5D MarkII 6D 7D 60D 50D 40D 30D 650D 600D 550D 500D 450D 400D 1100D 1000D GN60 (m ISO 100, @200mm). 22 steps from 1/1 to 1/128. Stable consistency and color temperature with good even lighting. Fully support Canon EOS 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 1/80 )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.