Bower Dedicated eTTL eTTL2 Off Camera Flash Cord For E-TTL OFF CAMERA FLASH SHOE CORD FOR CANON 580EX 430EX / EOS ETTL/EOS DSLR OC-E3 / OC-E3 O7B Dedicated eTTL eTTL2 Off Camera Flash Cord For E-TTL OFF CAMERA FLASH SHOE CORD FOR CANON 580EX 430EX / EOS ETTL / EOS DSLR OC-E3 / OC-E3 O7B