Acer W500P - Manual (Page 24)

Device Control 20
English
Device Control
Device Control is a convenient way for you to control the screen brightness and
adjust the volume to suit your needs. It also indicates the location of each port
on your computer and allows you to turn your connectivity devices on or off,
select a power scheme, lock your computer, turn it off, or place it in Sleep
mode.
The Device Control UI also indicates if the tablet is docked:
Or if the tablet is undocked:
If you have any devices plugged into a USB port or the HDMI port, Device
Control will show what type of device is plugged into each port. If you have