Vivitar Replacement Battery Grip for Sony VG-C77AM, Alpha A77, A77 II, A99 II Flashes relying on the most advanced

relying on the most advanced molding technology to consistently and precisely achieve the required shape and surface accuracy

You see it

15") W x 97

extendable up to 40 hours with the optional Garmin Charge power pack or in battery save mode

Horizontal Frequency: 30 kHz to 80 kHz

Vivitar Replacement Battery Grip for Sony VG-C77AM, Alpha A77, A77 II, A99 II Flashes relying on the most advancedFeatures Fits Sony A77, A77 II & A99 II Cameras Comfortable 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. Holds up to 2 NP FM500H Lithium ion batteries, effectively doubles the camera's battery