HP EliteBook 8570p Maintenance And Service Manual page 24

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*The antennas are not visible from the outside of the computer. For optimal transmission, keep the areas immediately around
the antennas free from obstructions. To see wireless regulatory notices, see the section of the Regulatory, Safety, and
Environmental Notices that applies to your country or region.
16 Chapter 2 External component identification
Component
Keyboard light button (select models only)
Keyboard light (select models only)
Description
Turns the keyboard light on or off.
Illuminates the keyboard, especially in low-light
conditions.