The Phottix Premium Series BG-D7000 Battery Grip for the Nikon D7000 DSLR has the same functions as the Nikon MB-D11 Grip, with AF/On button, power switch, command dials and multifunction controller. The BG-D7000 holds 6 AA batteries in the included tray. It also provides a comfortable vertical grip with an additional shutter release and scroll wheel for easy access to the camera functions when shooting vertically. The grip also has a tripod socket.