The Canon RS60 E3 replicates the functions of the shutter release button.
The remote switch, on a 2-foot cable, is quite compact, and is compatible with the Canon EOS Rebel 2000, EOS Rebel X/XS, EOS Rebel G, EOS Elan II, EOS Elan IIe, and EOS IX.
Specs
25-inch cable
7/8"W x 5/8"H x 3-1/4"D
warranty: 1 year