description:the canon bg-e2 vertical grip/battery holder adds a vertical shutter release, and is compatible with up to two bp-511, 511a, 512, 514 lithium-ion battery packs, or six aa batteries with included battery holder bgm-e2. the bg-e2 provides additional shutter release, main dial, ae lock/fe lock and af point selection controls for easier vertical shooting, as well as a 1/4-20 size tripod mount thread parallel imported warranty: warranty one year delivery within 2-4 business days