6
Functional USB cable
Mute microphone
Volume up
& volume down
Answer / end call
Call LED indicator
Mute LED indicator
Functional USB cable optimised for Microsoft Lync. It has
buttons for answering and disconnecting calls, turning up and
down the volume and muting the microphone. there's also
built-in DSP audio decoder - "Digital Signal Processing".
USB-C4 DSP - QD/USB cable
