Description About Product The Canon BG-E11 Battery Grip is an optional battery grip with improved ergonomics designed specifically for the Canon EOS 5D Mark III. It allows users to load a choice of one or two LP-E6 battery packs. With two packs, the already-impressive battery life is doubled, compared to using a single LP-E6 pack in-camera. This is especially useful when taking advantage of the camera's movie mode or Live View mode - operating modes that use more power. In addition, with the included battery magazine, you can also run the camera off six AA batteries. The BG-E11 also provides full vertical shooting controls, which can be independently turned on or off as the photographer needs to enhance camera handling, especially for shooting vertical pictures. It has a large number of operating controls as well: shutter button, Main Dial, multi-controller, AF point selection button, AE lock/FE lock button, AF start button, and multi-function button. Other Details Large capacity battery grip designed for the EOS 5D Mark III, ideal for high volume and easy vertical shooting Powered by up to two Battery Pack LP-E6, six AA-size/LR6 batteries or optional AC Adapter Kit ACK-E6 Improved ergonomics for comfortable holding Features a variety of operating controls: shutter button, Main Dial, multi-controller, AF point selection button, AE lock/FE lock button, AF start button, and multi-function button. Kit Includes: Battery Grip with Protective Cover; Soft Case for Battery Magazine; Instruction Book; Warranty Card