Dell Alienware M14x (Early 2011) - Manual (Page 29)

CHAPTER 2: GETTING TO KNOW YOUR LAPTOP
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5 Microphone connector — Connects to a microphone or inputs signal for use with
audio programs.
NOTE: You can set up 5.1 channel speakers by using the three audio connectors available
on your computer.
6 Headphone connectors (2) — Connect to a pair of headphones or to a powered
speaker or sound system.
7 9-in-1 Media Card Reader — Provides a fast and convenient way to view
and share digital photos, music, videos, and documents.
8 SIM Card Reader — Connects your computer to the Internet. To access the
Internet you must be within the network of your cellular service provider.