Powered by 2 x LP-E8 or 6 x AA batteries (not included). Vertical shutter with half-press function. More comfortable vertical shooting. Doubling the battery capacity of your camera, effectively extending your shooting time. Professional edition with vertical-grip shutter-release button, main dial, AE-L button, Index/Reduce button and Exposure button. Tripod screw mount. Same functions as the original battery grip Canon BG-E8. High quality product with a big discount from the original one.