Honeywell 4800i Quick Start Manual page 9

Trigger
The following bar codes will allow you to use the reader in Manual
Trigger mode (need to press the trigger to read) or Presentation
mode (the reader is activated when it "sees" a bar code).
Manual Trigger
Streaming Presentation™
Note: Streaming Presentation Mode applies only to units with the
Advanced Illumination feature. Units with the advanced
illumination feature have a software revision of 31205480-118
or newer.
When in Streaming Presentation mode, the imager leaves the scan
illumination on all the time and continuously searches for bar codes.
(Default)
Streaming Presentation Mode
Presentation Mode