Samsung SDP-860 User Manual page 21

Connecting Computer for Output
You can watch projected images on a PC monitor by connecting the
PC to the digital presenter via USB cable.
CAUTION:
For the USB cable connection, using a USB port on the main board of a
computer is recommended. (Using an extended front port or wireless USB
hub may cause errors depending on the computer brand and model.)
Please do not use a USB cable longer than 4.0m for the connection
between the projector and a computer.
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