A firmware update was recently released for the NVR6XX-4KS2 series devices.
Information, instructions, and download links can be found Here
File:Datasheet 4MP HDCVI PTZ 50430IC v001 006.pdf
From Dahua Wiki
Datasheet_4MP_HDCVI_PTZ_50430IC_v001_006.pdf (file size: 1.09 MB, MIME type: application/pdf)
Click on a date/time to view the file as it appeared at that time.
|current||23:54, 18 September 2018||(1.09 MB)||Qi Chen|
- You cannot overwrite this file.