Top quality off-camera flash cable for all Canon DSLR cameras. Similar specification to the Canon OC-E3 cable at a fraction of the price. One end clips to the hot shoe on your DSLR and the other end clips to the hot shoe of any flashgun dedicated to the Canon system. This allows you to shoot fully automatic flash with E-TTL metering with the flashgun off camera. No complicated exposure calculations are necessary, just fit it and start shooting.