Lenovo thinkvision x1 User Manual page 15

12. Your monitor has been embedded a pair of speaks with 3W, and it can support
HDMI/DP/TYPE-C/USB audio output.
You can press side volume control key to adjust sound of speaker.
13. When you connect your computer with TYPE-C cable, you can press the USB switch
button and follow the OSD menu to chose the USB2.0 with 4K2K picture or USB3.0 with
FHD picture.
14. Power on the monitor and the computer.
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Chapter 1.