The NBG300 holds an extra EN-EL3E battery or 8 AA batteries to offer double-length shooting time. It also features a vertical shutter release that makes shooting with the camera in a vertical position just as comfortable as shooting horizontally. The grip mounts through the camera's battery compartment and screws Into the camera bottom tripod mount
For Use With Nikon D300 & D700
Shutter Release Button Power On / Off Button AE lock/AF lock button Vertical-grip shutter button Improves Stability Tripod mount Weight 230g excluding batteries Dimensions L 147.5mm x D 72.5mm x H 110mm