Canon RS-80N3 (RS80N3) Camera Remote Switch for EOS 5D, 7D and 50D Cameras.
Canon RS-80N3 Remote Switch
Remote switch for EOS cameras with the N3-type socket to prevent camera shake for super telephoto shots, macro photography shots and bulb exposures. The Remote Switch works just like a shutter button, enabling halfway or complete pressing. It has a shutter-release lock and a 2.6ft/80cm cord.