Opteka Shutter Release Remote Control Cord for Canon EOS 1D, 5D I & II, 7D, 10D, 20D, 30D, 40D & 50D Digital SLR Cameras (Canon RS-80N3 Replacement) Opteka Remote Release for the Canon EOS 1D, 5D I & II, 7D, 10D, 20D, 30D, 40D & 50D Allows the camera to be released from a distance of up to 36 inches Half-press focuses, full press releases the shutter All Electronic - no batteries needed! Brand New, Sealed!