Telex Firefly P200 - Manual (Page 18)

14. After the Firefly ™ P200/P250 has cooled and the fans have stopped,
you may unplug the P200/P250 from the AC wall outlet.
NOTE: To use your computer and monitor without disconnecting them
from the P200/P250, the P200/P250 must be plugged into an AC wall
outlet. The
MONITOR jack on the Firefly ™ P200/P250 requires power to
operate the computer monitor.
NOTE: The projector does not need to be turned on to use the
MONITOR jack.
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User Manual 13