WR-A100 Wireless High Quality Remote Switch for Canon EOS-1V/1VHS, EOS-3, EOS-D2000, D30, 1D, 1Ds, EOS-1D Mark II,III, EOS-1Ds Mark II,III, EOS-10D, 20D, 30D,40D, 50D, 5D, 7D Fully Compatible with RS-80N3 Fully compatible to: Canon EOS-1V/1VHS, EOS-3, EOS-D2000, D30, 1D, 1Ds, EOS-1D Mark II,III 100 M range; does not require line-of-sight release 3-mode operation for shutter, sleep, and lock; locking function for bulb exposure Supports unique coding for anti-interference and avoiding wrong operation 3 feet cord, rechargeable lithium battery and mini USB charging device that has LED indicator Also compatible with EOS-1Ds Mark II,III, EOS-10D, 20D, 30D,40D, 50D, 5D, 5D Mark II, 7D