"Description: Specially designed for Sony SLT-A77V / SLT-A77 / SLT-A77 II 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, multi-selector ad front and rear control dial for shooting in a vertical position. Caution: Cover the power terminals with the contace cap when not in use. This prevents wlectric shorts caused bu metal objects touching the terminals. The control lock is not a power switch; use the camera power switch to turn the poewe on/off. The battery level may not display properly if batteries are inserted before attaching the grip to camera. Avoid water of extreme humidity and keep in a dre and coll place away from children. Specifications: Type:BG-3B Power Aource: 1*NP-FM500H or 2*NP-FM500H (Not Included) Fit Cameras:Sony SLT-A77V / SLT-A77 Fn button/Image rotation button Smart teleconverter button/Focus Magnifier button. Multi-selector AEL/SLOW SYCN/Image index button AF/MF/Enlarge button Exposure button Grip control ON/OFF swicth Rear control dial Operating Temperature:0-40 Degree Weight(approx.):13oz / 370g Dimensions(approx.):5.5*5*3.5" / 14*12.5*9cm Package Contents: 1 * Battery Grip for Sony SLT-A77V SLT-A77 1 * Manual"