COP-USA DVRMPEG4-16LAN - Manual (Page 110)

The button description:
Number Icon Description Function
Live control Press this button to view the live
picture of the DVR, and the user can
control the PTZF equipment in the
same time.
Remote-playback Press this button to playback the
record in the DVR via network.
File backup Press this button to backup the
file from the DVR to computer.
Local-playback Press this button to play the file
in the mobile disk or local disk of the
computer.
Volume Control Adjust the volume.
Snap shot Catch the picture of the record.
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