Lenovo USB 3.0 to DVI/VGA Monitor Adapter User Manual page 10

3. Connect the other end of the USB 3.0 cable to an available USB port on your computer, as shown:
Note: You can attach your computer to at most six external monitors at the same time using six adapters.
There will be a unique serial number for each monitor.
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Lenovo USB 3.0 to DVI/VGA Monitor Adapter User Guide