PIXEL FC-311 (3.6M) i-TTL Off Camera Flash Sync Extension Cord for CANON DSLR Cameras FC-311 is Canon EOS series camera and flash off-camera cable. It connects the camera and flash to precede off-camera sync flash; same as put the flash top on the camera. Its support all functions of EOS series and flash TTL function. High Quality flash E-TTL Off-Camera Shoe Cord for Canon DSLR and Flashes replace OC-E3B It is almost compatible with all Canon ex/ez series speedlites and EOS cameras,630 and RT cameras. The cable is coiled and the cable length is about 3.6M It connects the camera and flash to precede off-camera sync flash; same as put the flash top on the camera.