Datalogic QuickScan I QD21 1 Series Product Reference Manual page 267

Enter/Exit Programming Mode
Beep Duration
This feature controls the duration of beep
Beep Duration = 80 msec
Beep Duration = 120 msec
Beep Duration = 160 msec
Beep Duration = 200 msec
Product Reference Guide
indications.
Beep Duration = 60 msec
DEFAULT
Beep Duration = 100 msec
Beep Duration = 140 msec
Beep Duration = 180 msec
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