Nikon MBD200 is Multi Battery Pack which provides an AF-On button. Nikon MB-D200 Battery Holder is compatiable with Nikon D200 Digital SLR camera Nikon MBD200 Battery Holder is vertical firing release with lock and front and rear Command dials. Nikon MB-D200 Battery Holder is Supplied with MS-D200 AA Battery Holder. Requires one or two EN-EL3e or six AA Batteries (not included). Nikon MBD200 Battery Holder Provides AF-on button, vertical firing release with lock and front and rear command dials.