Vello BG-S1 Battery Grip for Sony Alpha SLT-A77 Camera
Compatible with the Sony Alpha SLT-A77 DSLR CameraComfortable and secure handling when shooting in the vertical position, including a secondary shutter release button, AF start button, smart teleconverter/focus magnifier,Fn/image rotation button, AEL/slow sync/image index, AF/MF/enlarge button, and exposure compensation buttons, a Multi selector, and a main dial.Accepts up to 2 NP-FM500H Lithium-ion batteries to effectively double the camera's battery lifeAnti-slip rubber gripping and a securely locking battery chamber doorInternal slot to fit the camera's battery chamber door when the grip is mountedMetal strap lug to attach a hand strap to cameraTripod screw mount socketPower Source:One or two NP-FM500H Rechargeable Lithium-Ion BatteriesOperating Temperature:32-104ºF (0-40ºC)Dimensions:5.6 x 5.0 x 3.5" (142.2 x 127 x 89 mm)Weight:9.4 oz (266 g) excluding battery tray and batteries