Asus VW221S User Manual page 12

1.4.2 Rear connectors of the LCD monitor
AC-IN port. This port connects the power connector from the bundled power
1.
cord.
Audio-in port. This port connects PC audio source by the bundled audio
2.
cable.(Only for some models)
DVI port. This 4-pin port is for PC (Personal Computer) DVI-D digital signal
3.
connection. (Only for some models)
VGA port. This 15-pin port is for PC VGA connection.
4.
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4
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Chapter 1: Product introduction