Dell Inspiron 15 (M5010, Early 2010) - Manual (Page 29)

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Using Your Inspiron Laptop
1 USB 2.0 connector — Connects to USB devices, such as a mouse, keyboard, printer,
external drive, or MP3 player.
2 Audio in/Microphone connector — Connects to a microphone or inputs signal for use
with audio programs.
3 Audio out/Headphone connector — Connects to a pair of headphones or to a powered
speaker or sound system.
4 HDMI connector — Connects to a TV for both 5.1 audio and video signals.
NOTE: When used with a monitor, only the video signal is read.