Camera Flash, E-TTL (Canon), E-TTL II (Canon)
From Amazon
Godox V1-C Round Head Camera Flash Speedlite, 2.4G X Wireless HSS 76Ws Speedlight Flash for 6D 7D 50D 60D 500D 550D 600D 650D 1000D 1100D 1DX 580EX II 5D Mark II III
WEX Photo Video
Godox V1 Flashgun for Canon
Clifton Cameras
Godox V1 Round Head Flash with Battery - Canon