DO now not recommend to purchase the more affordable Cuely 80N3 from different sellers, its high quality isn't always steady Our one is with better quality Features You can use this shutter launch cable to manage the shutter smoothly It can prevents the digicam vibration for macro photography, super telephoto shots, and bulb exposures release button reacts instant and paintings fine it's easy,firmly insert the plug into the camera&;s handheld remote control socket,and turn on the camera, then it's going to paintings now SpecificationsWork as long-established RS-80N3Halfway or total pressingPress it halfway right down to achieve focusPress it whole all the way down to take picturesShutter release lock (for long exposures)Press the button completely and slide it ahead to fasten for bulb images or continuous taking pictures Compatible withE0S R1, R3, R5 Mark II, R5, R5C, 10D, 1D, 1D Mark II, 1D Mark II N, 1D Mark III, 1D Mark IV, 1V, 20D, 20Da, 3, 30D, 40D, 50D, 5D, 5D Mark II/III/IV, 7D/7DII, D30, D60, 5DS/R, 6D/6D Mark II, 1DX, 1DX MARK II, 1DX MARK III Package Contents1 X Remote Switch