A firmware update was recently released for the NVR6XX-4KS2 series devices.
Information, instructions, and download links can be found Here
From Dahua Wiki
SensitivityandThreshold.jpg (682 × 395 pixels, file size: 47 KB, MIME type: image/jpeg)
Click on a date/time to view the file as it appeared at that time.
|current||19:41, 4 November 2015||682 × 395 (47 KB)||JP Wenger|
- You cannot overwrite this file.