Promaster Vertical Control Power Grip for D7000 Specially designed for the Nikon D7000. Allows the use of 8 AA style batteries. Shutter release button for vertical firing. This power grip can hold one EN-EL15 rechargeable Li-ion battery, in addition to the cameras internal battery It is equipped with an alternate shutter-release button, AE-L/AF-L button, multi selector, and main and sub-command dials for shooting in a vertical position.