Phottix Premium Series BG-D800 Battery Grip for Nikon D800 DSLR features AF/On button, command dials, vertical shutter button and multifunction controller. The BG-D800 holds 8 AA batteries or 1 EL-EL15 battery in the included trays.

The BG-D800 also provides a comfortable vertical grip with an additional shutter release and scroll wheel for easy access to the camera functions when shooting in the vertical orientation. The grip also has a tripod socket

comes with:
BG-D800 Grip
Battery Holder for 1x EN-EL15 Battery.
Battery Holder for 8x AA batteries.
User's guide