Opteka Battery Pack Grip/Vertical Shutter Release for Canon EOS Digital Rebel T2i (550D) Digital SLR Camera Holds 6 AA or 2 LP-E8 Batteries Vertical shutter release also makes shooting with the camera in a vertical position just as comfortable as shooting horizontal Buttons for AE lock, AF point selector, aperture value, shutter, and mail dial Increases functionality and convenience 1 Year Warranty