Fotodiox Pro FX-380 2.4GHz 32-Channel Wireless Shutter Release Kit - 3C for Canon EOS Pro Models: 7D, 10D-50D, and more Auto Coupling Capabilities to easily and quickly sync TX & RX 2.4 GHz frequency for up to a 220 foot working range Half press to activate camera auto focus, full press to fire Interchangeable camera cable to work with a wide range of cameras 24 Month Manufacturer Warranty