Mpman ICR350 - Manual (Page 21)

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The way to adjust the pre-set time is same as the above: set the Year, Month,
Day, Hour, Minute and Second one by one, and then press M or key to
confirm and exit after adjustment.
Note: press ● button to turn on/shut down the function of pre-REC. if you
shut down this function, there is no bell icon on the display.
3). Length of record
Press the M button to enter the record length interface:
The way to adjust the time is same as the above: set the Year, Month, Day, Hour,