Back door case

[akistdm]

Does the back door cap of go pro case fit to kingma case? There is a non waterproof cap for better sound using the case. Any other solutions?

 

[RiTCHiE007]

yea i bought one of ebay also and it seems like they all the same size. this the one i bought https://www.ebay.com/itm/321281729009

 

[akistdm]

Thank you for your help. I think that it's a good solution for better audio. Thanks.