Dahua Technology VTH2421F Series - Page 108

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Figure 4-15 Visitor pass
Step 3 Tap
Send to Visitor
to send the QR code to the visitor.
Tap
Save
to save the QR code to your smartphone.
Step 4 (Optional) Tap
Invalidate
to cancel the appointment, and then the QR code will not have
access permissions.
Tap
Invite Again
to generate a new pass for the visitor.