3.5 mm-C3 Spring Shutter Cable for Canon EOS 1Dx 5D Mark III, 5D mark II, 7D, 50D, 40D, 30D (Black) This 3.5 mm-C3 shutter cable works with Meida FS350, FS520, RF-16NE, RF-603 to remotely control different model cameras or multiple cameras. Connect Meida FS350, FS520, RF-16NE, RF-603 receivers to a camera with this spring cable Works with Meida FS350, FS520, RF-16NE, RF-603 to remotely control different model cameras or multiple cameras Compatible with Canon EOS 1Dx 5D Mark III, 5D mark II, 7D, 50D, 40D, 30D Convenient and practical to use