This Dot Line Off Camera TTL Shoe Cord maintains all on-camera flash functions (including E-TTL II) for one Canon-compatible shoe-mount flash unit used off-camera at distances up to 3'. It is compatible with all Canon EOS or G series cameras - digital or film - except for the 630 and RT cameras. This cable has a 3' heavy-duty coiled cord and features a shoe mount on the bottom of the flash connection shoe, as well as a 1/4"-20 socket.