HP 17 - Manual (Page 15)

2 External component identification
Display
Item Component Description
(1) WLAN antennas (2)* Send and receive networking signals using up to 2
integrated antennas to a local wireless router or hub.
(2) Proximity sensors (2) (select models only) Detects your presence in front of the computer and turns
the radiance backlight keyboard feature and the display
off or on based on your proximity to the computer.
NOTE: To make sure that the display does not turn off
while you are watching a movie or listening to music, the
proximity sensors are disabled when you start
PowerDVD, Windows Media Center, or Windows
Media Player.
(3) Internal microphones (2) Record audio using the integrated microphones by
specific programs. The microphones will automatically
improve the audio to reduce ambient noise and provide
echo cancellation.
ENWW Display 7