Neewer BG-3B Replacement Battery Grip for Sony VG-C77AM Works with 1pcs or 2pcs NP-FM500H Li-po Battery for Sony SLT-A77II SLT-A77V SLT-A77 Camera Specially designed for Sony SLT-A77II / SLT-A77V / SLT-A77 DSLR cameras. Can hold one or two NP-FM500H rechargeable batteries. Replacement for Sony VG-C77AM battery grip. Effectively extend your shooting time and enable shooting in the same fashion as a horizontal grip. Equipped with an alternate shutter-release button, AE-L/AF/MF button, Fn button, Image rotation button, Smart teleconverter button/Focus Magnifier button, Multi-selector, multi-selector ad front and rear control dial for shooting in a vertical position.