Powerextra MB-D12 Battery Grip Infrared Remote Control Replacement for Nikon D800/D800E/D810 Digital SLR Cameras Works with 1 pc EN-EL15 Battery Or 8 AA-size Batteries Fits one EN-EL15 battery or 8 AA batteries Vertical shutter release button on the Battery Grip makes shooting with the camera in a vertical position much easier, adding stability to the camera. It supports features such as AE lock and AF lock,and retains access to the Index/Reduce button, main dial,sub-command dial,AF-Point select button. High quality product with full vertical shooting controls Remote control included