adding 1 cam

[lagrabow]

I currently have a outdoor security cam system.
5 cams: 4- Amcrest IP3M-943
1- Dahua IPC HFW1320S
operating through an Amcrest nvr NV-4108-HS
which is capable of having 7 cams on board.

I would like to add one more cam, bullet style, outdoor that has audio.
[outdoor, 8MP, night vision up to 98 ft., wired/wireless choice, ]
Amcrest has nothing suitable ATM.
Can you suggest some cams that would be suitable.
The nvr is 4k compatible.
Thank you.