This grip is specially designed for the Nikon D300/D300s/D700 DSLR cameras. 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.
This power grip can hold one EN-EL3e rechargeable Li-ion battery, in addition
to the camera’s internal battery to extend your shooting
time or can conveniently use eight AA batteries (alkaline, Ni-MH or lithium).