This battery grip/holder is a Pro Battery Grip for the NIKON D5100/D5200 DSLR Cameras. Vertical shutter release button on the Battery Grip makes shooting with the camera in a vertical position much easier, adding stability to the camera. Beware that the batteries should be put into the magazine before inserting the magazine into the grip! Hold 2 EN-EL14 Li-ion batteries. Doubling the battery capacity of your camera, effectively extend your shooting time. A tripod jack on the bottom of the grip for fixing it on a tripod firmly.