Vello BG-S7 Battery Grip

The BG-S7 Battery Grip for Sony a1, a9 II, a7 S III, a7R IV, and a7 IV Series Cameras from Vello can be installed directly into the camera's battery chamber, just remove the camera's battery door, and store it conveniently inside grip's stem. Align the grip stem inside the camera battery chamber to ensure power is being supplied to the camera, then secure the grip to the body using the thumbscrew into the camera's 1/4"-20 tripod socket.   Key Features Holds 2 NP-FZ100 Rechargeable Batteries Extended Grip for Vertical Composition Shutter Release Button for Vertical Use Secondary Control Set for Vertical Use C1 and C2 Function Buttons AF-ON and AEL Buttons Multi-Selector Joystick Rubberized Nonslip Grip Threaded 1/4"-20 Tripod Socket Mount for Shoulder Strap or Hand Grip   Replacement Value: $100