Lenovo 40Y8184 Guia Del Usuario página 11

Adjusting the microphone
To use the microphone, swing the microphone arm down until it is
adjacent to your mouth. To adjust the volume control, do the following:
1. Open the Windows Sound Manager by double-clicking the speaker
icon in the system tray.
2. Select Options -> Properties.
1-5
About the Lenovo USB/Analog Headset by Sennheiser