The Phottix BP-5D11 is a Premium Series Vertical Grip/Battery Holder for Canon"s 5D Mark II digital cameras. The battery grip can hold 2 LP-E6 batteries or 6 AA batteries to offer double-length shooting time. It is also equipped with a vertical-grip shutter release button, main control dial, AE lock/FE lock and a AF point selection control for easy vertical shooting. It works with 1 or 2 LP-E6 rechargeable batteries and includes a battery holder for the AA batteries. It also incorporates a built in tripod socket. It will not work with the Canon 5D.