Battery Grip for Canon EOS 550D with Two Battery Holder

1)This battery grip can hold two batteries LP-E8 or six size-AA batteries. 2) It is also equipped with a vertical-grip shutter button, Main Dial, AE lock/FE lock and AF point selection controls for easier vertical shooting. Also has Tripod Socket. 3)Power switch: camera's power switch 4)Working humidity: 85% or less 5)Dimensions: 131.8mmx108mmx79.9mm 6)Same hold feeling as original grip 7)Vertical shooting more comfortable. 8)Battery Grip for Canon EOS 550D