The Ulanzi G9-3 battery door for GoPro HERO9 cameras is a ABS plastic replacement battery door that features an open-port USB-C design for in-use charging. 

This battery cover not only allows you to charge the camera while in use but you can also connect the GoPro mic adapter accessory to the camera allowing you to run external microphones. 

In The Box: 

• 1 X  G9-3 Battery Cover for HERO9 (ABS Plastic)
• EVO Gimbals Micro Fiber Cleaning Cloth
• Limited 1-Year Warranty