Dahua NVR21-4KS3 Series User Manual page 231

Step 8 Configure the search conditions as needed.
Table 5-29 Descriptions of search conditions and results
No. Name
1 Search Condition
Figure 5-99 Custom search 3
Figure 5-100 Search conditions and results
Description
Configure the channel and period. When choose Custom,
you can set the start time and end time as needed. Up to 7
days can be set.
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User's Manual