DSTE Pro IR Remote BG-E7 Vertical Battery Grip for Canon EOS 7D SLR Digital Camera as LP-E6 LP-E6N 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 two 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.