DSTE Pro IR Remote MB-D16 Vertical Battery Grip for Nikon D750 SLR Digital Camera as EN-EL15 Built in Infrared remote control function 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 six AA Battery for extended shooting The rugged, but lightweight, body design has gasket-sealed controls to resist dust When using two batteries, the grip will automatically switch to the second battery if the first becomes depleted. Switching does not interrupt camera operation.