RFN-4 (RF-911) Wireless Remote Shutter Release Cable for Canon EOS DSLR Camera with N3 (RS-80N3) Connector - for Canon 6D, 5D, 5D Mark II, 5D Mark III, 1D, 1Ds, Mark II, III, IV, 1DX, 7D, 60D, 50D, 40D, 30D, 20D, 10D Both Wired Cable Release and Wireless Remote Control Shutter Release Maximum range of 260 feet or 80 meters. 16 selectable channels in 2.4GHz operating frequency. Bulb mode function. Conveniently uses AAA batteries in both Receiver and Transmitter