The Godox PB1000 Canon Cable connects the PB1000 Power Pack to Canon flashes with external power box interfaces, such as 600EX, 430EZ, 540EZ, 550EX, 580EX, 580EX II, and more. It is also compatible with Godox flashes that feature external power inputs, including the TT685II, V100, V1Pro, and AD200ProII.