LG CineBeam PF510QC Owner's Manual page 19

NOTE
•
When using the remote control, the optimal operation range is 6 meters
(19.6 feet) or less (left/right) and within a 30 degree arc of the remote control
IR receiver.
•
If a cable is connected to the back port, the optimal operating range is 3 meters
(9.8 feet) or less (left/right) and within a 30 degree arc of the remote control
IR receiver.
•
For seamless operation, do not block the IR receiver.
•
When you carry the remote control in the portable bag, make sure that
the buttons on the remote control are not pressed by the projector, cables,
documents, or any other accessories in the bag. Otherwise, it may significantly
reduce the battery life.
19