Dell Inspiron 13z, Manual

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Speakers
Speakers
Speakers are used to listen to sound from the computer. Speakers
can be internal or external. On desktop computers, internal speakers
are generally used only for producing error or failure beeps. External
speakers, also called multimedia speakers, produce sound for movies,
songs, multimedia content, and so on. Speakers are generally identified as
2, 2.1, 5.1, 7.1, and so on. The digit before the decimal point indicates the
number of channels and the digit after the decimal point (1) indicates the
subwoofer. Speakers are commonly connected to the computer using a
3.5 mm connector or using USB connector.
NOTE:
For 5.1 or 7.1 channel speakers to produce 5.1 or 7.1 channel
sound, your computer sound card must support 5.1 or 7.1 channel
audio.
Webcam
A webcam is a device that allows you to capture real-time video or
images, and can also be used for video conferencing.
The webcam type may vary based on the selections you made while
purchasing your computer. You may have a built-in webcam or you may
need to buy an external webcam. External webcams connect to your
computer using the USB connector. A camera quality is generally defined
by the number of pixels it can capture.