The BG-N12 Battery Grip from Vello is designed specifically for the Nikon D3400 DSLR camera and accepts one or two EN-EL14 or EN-AL14A batteries. With two batteries installed, your shooting time is effectively doubled. More so, when one battery is drained, it can be removed and recharged while you continue shooting with the other battery. The BG-N12 features an anti-slip rubber grip, a tripod socket to mount your camera directly to a tripod, and includes a holder for the camera?s battery door so as not to lose it when the battery grip is installed. Please note that although the grip does come with a vertical shutter release button, since the D3400 does not provide a socket for the necessary release cord the vertical shutter button will not function. Holds up to two EN-EL14 or EN-EL14A batteries, doubling the battery life for the Nikon D3400. Features anti-slip rubber gripping and a securely locking battery chamber door. Contains a camera battery door holder to store the camera?s battery chamber door when the grip is mounted