It connect your Speedlite on one end of the cord and the other end will be mounted to the Hot Shoe unit of your camera. You can extent the cord by 0.6 metres long and away from the camera in any shooting degrees you wish to point the flash towards your subject. This Cord 2 unit also come with a built-in tripod socket at the other end where the Speedlite unit is attached to which permits it to be locked onto a tripod and frees your hand from holding the off-camera flash. length: 45cm~1m (flexible) Compatible model: Digital Rebel Digital Rebel XT Digital Rebel XTi Digital Rebel XSi T1i 500D / 350D / 400D / 450D / 1000D / 5D / 10D / 20D / 30D / 40D / D60 ; EOS 1D Mark II EOS 1D Mark IIN EOS 1D EOS 1Ds Mark II EOS 1Ds ; Flash unit: 220EX 300EZ 380EX 420EZ 420EX 430EZ 430EX II 480EG 540EZ 550EX 580EX II.