Dahua NVR21-4KS3 Series User Manual page 154

Step 4 (Optional) Click Search Condition, change the search conditions, and then click Search.
You can only select up to 8 targets for search.
Step 5 Hover over a search result to view the basic information including channel, start time, end
time and target type. Double-click a result to play the video.
Figure 5-21 Search results
Figure 5-22 Search conditions
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User's Manual