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