Canon RS-80N3 Remote Switch.
Compatible with EOS-3, 1v HS/1v, 1D-series, 1Ds-series, 5D-series, 7D, 10D, 20D, 30D, 40D, 50D, D30, D60, and D2000.
Remote switch with a 80cm cord to prevent camera shake for super telephoto shots, macrophotography, and bulb exposures.
The Remote Switch works just like a shutter button, enabling halfway or complete pressing. It also has a shutter release lock. Its quick-lock plug connects to the N-3 type remote control socket on many EOS Bodies.
Weight = 53.8 grams