AOC SPT6531V User Manual page 20

2.2.4. Operating range of the remote control
Point the top front of the remote control at the
remote sensor on the display when you press the
buttons.
NOTE:
The remote control may not function properly
when the remote control sensor on the display
is under direct sunlight or strong illumination,
or when there is an object between the remote
control and the remote sensor of the display.
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