Left Side; Right Side - Asus ET2040I User Manual

Left side

Right side

Brightness up button
Press this button to increase or decrease the brightness of your
ASUS All-in-One PC.
Brightness down button
Press this button to decrease the brightness of your ASUS All-
in-One PC.
Volume button
Press to increase or decrease the volume.
HDMI Output Port
Connect this port with devices equipped with an HDMI input
port, such as an LCD monitor or projector.
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ASUS All-in-One PC