The Canon RS-80N3 remote switch is a wired remote shutter for EOS series cameras. I have only used it a few times since purchasing it. There are no scratches or stains. It is convenient for long exposures. No instruction manual (although you should be able to use it intuitively, you can also download it from the CANON website) - Model Name: RS-80N3 - Brand: Canon - Type: Remote Switch - Connection Type: Wired - Compatible Models: Canon EOS series Compatible with digital SLR cameras / mirrorless cameras ◆ Compatible Products EOS-1D X Mark III / 1D X Mark II / 1D X / 1Ds Mark III / 1Ds Mark II / 1Ds / 1D Mark IV / 1D Mark III / 1D Mark II N / 1D Mark II / 1D EOS 5Ds / 5Ds R / 5D Mark IV / 5D Mark III / 5D Mark II / 5D / 6D Mark II / 6D EOS 7D Mark II / 7D / 60Da *1 / 50D / 40D / 30D / 20D / 20Da / 10D / D60 / D30 EOS R3 / EOS R5 *1 When using with EOS 60Da, the Remote Controller Adapter RA-E3 included with the EOS 60Da is required. *2 When using, the separately sold Remote Controller Adapter RA-E3 is required. Film Cameras EOS-1V / 1VHS / 3 ◆ Release Function: With release lock function, two-stage push button switch ◆ Cord Length: 80cm ◆ No power supply (supplied from the camera) ◆ Weight: 50g Thank you for viewing.