The WFT-E7A Wireless File Transmitter from Canon makes it simple and easy to set up wired and wireless transfers with the 5D Mark III DSLR camera. The WFT-E7A supports IEEE 802.11 a/b/g/n for fast and secure connections over a LAN connection, and it also supports Gigabit Ethernet for wired connections. This transmitter has a built-in Bluetooth function that allows it to handle high-volume data wireless transfers as well. Its compact and lightweight design makes the WFT-E7A a great addition to a professional photographer's wireless workflow. A required LP-E6 rechargeable battery is not included.