Lenovo Flex 20 All-in-One IdeaCentre - Manual (Page 8)

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User Guide
Left and right view of the computer
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2
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Combo audio jack*
USB 3.0 connectors (2)
Power connector
* Combo audio jack: Used to connect headsets.
Notes:
• The combo audio jack does not support conventional microphones.
• Different industry standards may lead to the recording function not being
supported if third-party headphones or headsets are connected.