Asus All-in-One PC PT2002 Series User Manual page 14

Built-in digital microphone (optional)
This built-in digital microphone can be used for video
conferencing, voice narrations, audio recordings, and
multimedia applications.
LCD display (Touch-enabled)
The 19.5-inch multi-touch panel LCD display provides excellent
viewing features for photos, videos, and other multimedia files.
It also allows you to operate your ASUS All-in-One PC using
touch gestures.
Windows® 8.1 touch button
Touch this button to go back to the Start screen. If you are
already in the Start screen, touch this button to go back to the
last app you opened.
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ASUS All-in-One PC PT2002