UROVO DT50S User Manual page 36

Illum/Aimer Off: turn off illumination / aimer light;
Aimer Only: turn on aim light only;
Illum Only: turn on illumination only;
Alternating: turn on illumination and aim light in alternation;
Concurrent: turn on illumination and aim light at the same time;
Exposure Mode:

scanning engine may automatically regulate the exposure
value; in the on mode, the exposure value can be set;
Fixed Exposure: 1~900, The higher the value is, the
brighter it will be;
Figure 2- 24 Lights Configuration
auto/on. In the auto mode, the
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