Canon WFT-E3A Wireless File Transmitter for EOS-40D & 50D New wireless transmitter dedicatedto the EOS 50D and 40D camera.Completely integrated design foroutstanding handling; includes verticalcontrols. Wireless transmission(802.11b or g) to Mac or Windowscomputers. Three separate wirelessmethods, including wireless remotecontrol of camera from computer.Transmits up to 492 ft. (150m)*,depending on environment andcomputer set-up; wired Ethernetconnection up to 1,000 ft. (330m).Its USB port allows an externalhard drive to be directly connectedto the camera.