Allows the D800, D800E, and D810 to be powered by two EN-EL15 batteries Effectively doubling your capacity Comfortable vertical grip with an additional shutter release and scroll wheel With the included AA battery holder, users can also the camera with 8 AA batteries The MB-D12 Series Multi- Battery Grip allows the D800, D800E & D810 to be powered by two EN-EL15 batteries -- one in the camera body and one in the MB-D12 -- effectively doubling your capacity. Colour: Black material: plastic size:15.07*8.1*5.03cm Package Contents: 1x battery grip 1x Li-ion battery holder 1x AA battery holder 1x user manual Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.