PowerLite 7850p Multimedia Projector

Yes. You can connect an external monitor to the projector’s Monitor Out port to project simultaneously on a monitor and the projection screen. This feature can only be used when your input video source is a computer. See Connecting an External Monitor for more information.

If you’re projecting from a laptop and you can't see your image on the projection screen and your computer at the same time, you may need to adjust settings on the laptop.