DSTE Pro IR Remote MB-D12 Vertical Battery Grip + 2x EN-EL15 for Nikon D800 D810 D800E D800S D810A SLR Digital Camera A firm, comfortable grip for vertical-position shooting with the Camera. Buttons and controls are conveniently placed and easy to reach for greater comfort. Holds one Li-ion batteries or eight AA Battery for extended shooting Li-ion Battery Info: DC 8.4V (max); DC 7.2V (mean) 17.9Wh/2550mAh The rugged, but lightweight, body design has gasket-sealed controls to resist dust. Built in Infrared remote control function and remaining power indicator