What's in the box:

Andoer V-Mount V-Lock Adapter Plug for V-Mount Power Supply Battery for DSLR Video Cameras (Black Red)

This is a V-lock adapter compatible for your V-mount battery. With it, you can fix your V-mount battery more stably on the V-mount battery plate.

Features:
This is a V-lock adapter compatible for your V-mount battery.
With it, you can fix your V-mount battery more stably on the V-mount battery plate.
Comes with 3 screws for you to mount it easily.
Compact and solid design.

Specifications:
Material: ABS Plastic
Item Size: 3.5 * 3 * 0.5 / 1.4 * 1.2 * 0.2in
Item Weight: 4g / 0.13oz
Package Size: 9.5 * 4.5 * 0.5cm / 3.7 * 1.8 * 0.2in
Package Weight: 8g / 0.3oz

Package List:
1 * V-Lock Adapter
3 * Screw