"Canon's WFT-E5A Wireless File Transmitter (WFT) is designed exclusively for EOS 7D Digital SLR cameras. The WFT-E5A provides professional photographers a wide range of digital connectivity options including IEEE802.11a/b/g and Ethernet, ideal for commercial and studio work. The WFT-E5A wireless file transmitter opens the door to new possibilities in remote and Geotagged shooting applications. Photographers can fire up to 10 cameras simultaneously from across the room or across the country while maintaining control over camera settings and remote live view on a laptop or smart phone. The WFT-E5A wireless transmitter can also transfer and display images on DLNA (Digital Living Network Alliance) compatible televisions and photo frames. Geotagging is now possible via Bluetooth, using compatible GPS devices to append coordinate data to the images." - See-ming Lee 李思明 SML from Bookmarklet