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