B071CD9K7X DSTE Replacement for Pro IR Remote MB-D3400 Vertical Battery Grip + 2X EN-EL14 EN-EL14a Compatible Nikon D3400 SLR Digital Camera

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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
Li-ion Battery Info: DC 8.4V (max); DC 7.2V (mean) 11.8Wh/1600mAh
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