The SOONWELL Battery Slide Pro V-Mount for Sony FX9 attaches to the rear of the camera, securing to the top via two included screws, and it provides a V-mount battery plate and two D-Tap connectors as a power solution for your camera. A short integrated cable features a dedicated barrel connector for the FX9 camera. With an optional V-mount battery attached, the D-Tap ports can be used to power accessories simultaneously with the camera. The body of the Battery Slide Pro is made of plastic and the V-lock aluminum.