Dell Precision 7720 Owner's Manual page 68

Option Description
USB PowerShare This field configures the USB PowerShare feature behavior. This option allows you to charge external devices
using the stored system battery power through the USB PowerShare port (disabled by default)..
Audio This field enables or disables the integrated audio controller. By default, the Enable Audio option is selected. The
options are:
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Keyboard This field lets you choose the operating mode of the keyboard illumination feature. The keyboard brightness level
Illumination can be set from 0% to 100%. The options are:
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Keyboard The Keyboard Backlight with AC option does not affect the main keyboard illumination feature. Keyboard
Backlight with AC Illumination will continue to support the various illumination levels. This field has an effect when the backlight is
enabled (selected by default).
Keyboard The Keyboard Backlight Time-out dims out with AC option. The main keyboard illumination feature is not affected.
Backlight Timeout Keyboard Illumination will continue to support the various illumination levels. This field has an effect when the
on AC backlight is enabled.
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Keyboard The Keyboard Backlight Time-out dims out with Battery option. The main keyboard illumination feature is not
Backlight Timeout affected. Keyboard Illumination will continue to support the various illumination levels. This field has an effect
on Battery when the backlight is enabled.
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Unobtrusive Mode This option, when enabled, pressing Fn+F7 turns off all light and sound emissions in the system. To resume normal
operation, press Fn+F7 again. This option is disabled by default.
Miscellaneous Allows you to enable or disable the following devices:
Devices
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68 System setup
NOTE: USB keyboard and mouse always work in the BIOS setup irrespective of these settings.
Enable Microphone (by default enable)
Enable Internal Speaker (by default enable)
Disabled (selected by default)
Dim
Bright
5 sec
10 sec (selected by default)
15 sec
30 sec
1 min
5 min
15 min
never
5 sec
10 sec (selected by default)
15 sec
30 sec
1 min
5 min
15 min
never
Enable Camera —enabled by default
Enable Expresscard (selected by default)
Enable HardDrive Free Fall Protection (selected by default)
WiFI Radio (selected by default)
Enable Secure Digital (SD) Card (selected by default)
Secure Digital (SD) Card Read-Only Mode
Secure Digital (SD) Card Boot