Question about Lenovo USB Type C standard power supply unit

Hi Samsum,

I wanted to be able to use the Lenovo laptop outdoors without a large monitor, so I used the standard USB-C power supply.
By the way, it works at home with or without the power supply, i.e. the large monitor is then virtually the power supply USB-C and I can work with both monitors (Dell and Lenovo) separately. I have no experience with HDMI.

Greetings, Willi Sieber