What's in the box:

ulanzi G8-7 Action Camera Battery Cover Lid Removeable Type-C Charging Port Adapter Aluminum Alloy Compatible with GoPro Hero Black 8 (Standard)

Features:
The battery side door is specially designed for GoPro Hero Black 8.
Providing access to charging port while battery are safely covered by the door, without fearing the battery will fall out.
The battery cover offers charging access to your action camera, so you can use power bank with it.
Perfect for continuous shooting like recording time lapse or video.
Aluminum alloy material, durable and lightweight.

Specifications:
Brand: ulanzi
Model: G8-7
Fits: Compatible with GoPro Hero Black 8
Package Size: 6 * 6 * 4cm/ 2.4 * 2.4 * 1.6in
Package Weight: 16.5g/ 0.6oz

Note:
Only the battery is included.

Packing List:
1 * Battery Cover