DSTE Pro IR Remote MB-D10 Vertical Battery Grip + EN-EL3E for Nikon D300 D300S D700 D900 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) 16.3Wh/2200mAh When using two batteries, the grip will automatically switch to the second battery if the first becomes depleted. Switching does not interrupt camera operation. Built in Infrared remote control function and remaining power indicator