The deluxe power grip provides extended shooting time,allowing you to get more great photos without worrying about your battery.It can holds 2 NP-FM500H batteries,and adds multiple camera functions while enabling you to hold the camera in a vertical position.It is equipped with an alternate shutter release,AE-L,and AF/MF buttons,along with a multi-selector and front and rear control dials.The deluxe power grip attaches through the tripod mount on the bottom of you camera.