NEC MultiSync P401 User Manual page 11

Kensington Lock
For security and theft prevention.
EXTERNAL SPEAKER TERMINAL
To output the audio signal from AUDIO 1, 2, 3, DPORT,
HDMI and TV jack.
Red terminal is plus (+).
Black terminal is minus (-).
Note: This speaker terminal is for 15W + 15W (8 ohm)
speaker.
Option board slot
Slot for board accessories. Please contact your supplier for
detailed information.
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