Powerextra MB-D15 Vertical Battery Grip + AA-size Battery Holder Compatible With Nikon D7100 D7200 Digital SLR Camera Work With EN-EL15 Battery or 6 pcs AA-size Batteries Quick release battery grip can hold 1 pcs EN-EL15 or 6 pcs AA-size battery backup, doubling the battery capacity for extending more shooting time. A tripod socket on the bottom of the grip can be mount on a tirpod, easy install and uninstall, horizontal and vertical shutter fit different shooting experience. Same function on the grip as the camera, not affected any function of the original camera , Feature a variety of operating control: shutter button, Main Dial, multi-controller, and multi-function button. Battery grip only for Nikon D7100 D7200 DSLR camera, Note: battery grip only, not including the battery, camera. Vertical firing release with lock, the surface material:PC + GF10 + striae process, have a superior holding feeling.