Video And Audio Configuration - GeoVision GV-EBX1100 Series Firmware Manual

3.2.7 Video and Audio Configuration

You can enable the microphone and speaker for two-way audio
communication and adjust the audio volume. To change audio
configuration, click the Show System Menu button (No. 9, Figure 3-3),
and select Video and Audio Configuration.
Camera: Sets the number of frames to keep in live view buffer.
Keeping more frames for live view buffer can ensure a smooth live
view, but the live view will be delayed for the number of frames
specified.
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Figure 3-11