Battery Grip compatible with Nikon D750 to extend shooting time in addition to in-camera battery. Has two battery cradles - can either use 4xAA batteries or the Nikon EN-EL15 as in the camera. Might be compatible with other bodies, you will have to do your research and determine.
Bought for $299.95 and never used in the field. Just tested in the house a couple of times. Includes all OEM manuals and packing material.
The MB-D16 is equipped with a shutter-release button, AE/AF lock button, multi selector, and main- and sub-command dials for improved operation when taking photographs in portrait (tall) orientation.