2 External component identification
Display - Windows models
Component Description
(1) WWAN antennas (2)* (select models only) Send and receive wireless signals to communicate with wireless
wide-area networks (WWAN).
(2) WLAN antennas (2)* Send and receive wireless signals to communicate with wireless
local area networks (WLAN).
(3) Internal microphone(s) (1 or 2 depending on
model)
Record sound.
(4) Webcam light (select models only) On: The webcam is in use.
Display - Windows models 7
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