ViewSonic VP2771 User Manual page 57

3. Dual Color
Monitor comes with dual color engine to display two different color
settings in PIP or PBP mode. Compare to main window, you can set
different color preset modes in sub-window.
4. Ambient light sensor and Presence sensor
Ambient light sensor: Automatically adjusts the brightness to the
optimal setting based on the brightness level of the environment.
Presence sensor: Human sensor prompts the monitor switch to
power saving mode (Backlight off only ) when you are absent after
15 sec ,and then backlight light up again after 3 sec when you
return.
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