Opteka RC-4 Wireless Remote Control for Canon EOS Digital Rebel XT, XTi, XSi, T1i, T2i, T3i, T4i, 60D, 7D & 5D Mark II/III Digital SLR Cameras Wireless camera operation for Digital Rebel, XT, XTi, XSi, T1i, T2i, T3i, T4i, 60D, 7D, 5D Mark II, 5D Mark III and most film EOS SLR's. Allows for shutter release up to 16 feet Instant or 2-second shutter release delay Makes group photos easy Battery included, Typical Battery Life - up to 2 years, 10,000 exposures