Andoer Vertical Battery Grip BG-3B Replacement Holder for Sony SLT-A77V / SLT-A77 A77II Replacement for Sony VG-C77AM This battery grip/holder is compatible for Sony SLT-A77V / SLT-A77 A77II camera. Features shutter release button, main dial, AE lock and AF point selection button for easier vertical shooting. It help photographing in a vertical position much easier and provides a better handling of your camera especially when you are using heavy lenses. The battery compartment holds one NP-FM500H lithium battery.(battery not included) Has a tripod socket.