I charged my USB C Beats Flex by plugging them into my iPhone. I also have a portable monitor that gets power and video from a single USB C cable. I bought it

I charged my USB C Beats Flex by plugging them into my iPhone. I also have a portable monitor that gets power and video from a single USB C cable. I bought it as an external monitor for when I travel. But it also works with my iPhone without an adapter by using a regular USB C cable. My iPhone can power the monitor up to 50% brightness by itself or I can plug the monitor up to a power source using a second USB cable to get full brightness and then the monitor will charge the phone. https://imgur.com/a/aGJ4lvt https://imgur.com/a/aGJ4lvt