Plantronics MCD100-M USB Speakerphone 7
For Windows Vista, click on the following: “Start”, “Control
Panel”, “Hardware and Sound”, “Sound – Manage Audio
Devices”. From there select the Playback tab and make any
further adjustments to MCD100-M (speaker) settings. Then select
the Recording tab and make any further adjustments to the
MCD100-M (microphone) settings.