Philips Voice Tracer VTR5000 User Manual page 61

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The setting method refers to "System Time Setting".
Duration
It is used to set duration of auto record. Device will
automatically save recording when reach the preset time.
On the stop interface of music mode, consecutively short press
on the MENU to enter the duration setting, as shown in the
following figures:
Press or button to select "ALL"(to disable auto save)、
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