However, because the receiver is positioned on the top of the projector, depending on the presentation conditions, it may be necessary to point the remote toward the projector or toward the ceiling in order to get the infrared signal to the sensor. You can switch back and forth between any single source simply by selecting the proper source button on the control panel. There is no need to disconnect or restart any devices. Yes, an 18-metre extension cable is available and must be used with the hub connector supplied with the projector in order to work properly. You can buy a cable through a professional AV retailer.
Plenum cable has a metal sheath inside that meets required wiring code for permanent installation.
If you were to make a projector a permanent part of a conference room, for example, you would choose cable with plenum. Non-plenum cable is suitable for temporary installations. Avoid looking directly into the lens. Keep children from looking into the lens. Do not disassemble the projector.