Speco D4VT User Manual page 27

Select the sensor setting for the selected channel.
SENSOR
RECORDING
PRE RECORD Enable/disable pre-event recording. Pre-event recording time is up to 20 minutes.
POST EVENT Set the post event recording time duration for the specified channel.
RECORD (10~60 seconds)
Enable/disable audio recording for the specified channel.
AUDIO
SCHEDULE Set the recording schedule.
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