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Phottix Premium Series BG-A77 Battery Grip for Sony A77 DSLRs features AEL, AF Points, and Exposure compensation buttons, command dial, vertical shutter button and power switch. The BG-A77 holds 1 or 2 NP-FM500H batteries.
The BG-A77 also provides a comfortable vertical shooting with an additional shutter release and scroll wheel for easy access to the camera functions when shooting in the vertical orientation. The grip also has a tripod socket.