Acer Aspire 4520 - Manual (Page 35)

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Closed front view
# Icon Item Description
1 CIR receiver Receives signals from a remote control.
2 Line-in jack Accepts audio line-in devices (e.g., audio
CD player, stereo walkman).
Microphone-in jack Accepts input from external
microphones.
Headphones/speaker/
line-out jack with
S/PDIF support Connects to audio line-out devices (e.g.,
speakers, headphones).
3 Unlimited volume
control wheel Adjust the volume of the audio-out.