StarTech.com 7.1 USB Audio Adapter External Sound Card - Manual (Page 12)

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MIC (1) IN
•
Connect the Audio Cable on a Microphone, to the Mic 1 In
Port on the Audio Adapter (right channel only).
MIC (2) IN
•
Connect the Audio Cable on a Microphone, to the Mic 2 In
Port on the Audio Adapter (left channel only).
Push Button Controls and LEDs
Button/LED Function
Volume Mute Press this button to mute/
un-mute audio outputs.
Mic Mute Press this button to mute/un-
mute microphone.
Volume (UP, Down) Increases or decreases
audio output volume.
Microphone Mute LED When the microphone
inputs are muted, the light
will turn on.
Power/ Activity LED The light will be on when
the system is powered up.
The light will blink when
activity is detected