Question about Verbatim PMT-15-4K

This screen is powered by an external power supply unit, which is supplied with it and is particularly useful when using the HDMI port. It can also be powered via USB-C, but the latter must be of high quality (USB 3.2 Gen 2x1 or Thunderbolt) to ensure video transmission and power supply. There's no mention of an integrated battery, so it doesn't run on battery power and doesn't have any autonomy when disconnected from the power supply.

In short, it needs to be connected to an external power source at all times to operate, and there's no information about charging or battery life in wireless mode.

Thank you very much!