A firmware update was recently released for the NVR6XX-4KS2 series devices.
Information, instructions, and download links can be found Here
File:NxxCG52-NxxCG53 QuickStartGuide- 20170626.pdf
From Dahua Wiki
NxxCG52-NxxCG53_QuickStartGuide-_20170626.pdf (file size: 936 KB, MIME type: application/pdf)
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|current||01:26, 11 July 2018||(936 KB)||Qi Chen|
- You cannot overwrite this file.