those look to be the panels used to construct large scale LED walls. theres a writeup on adafruit about how to build one.
i built one as a project several years ago… you need to get some pretty specialized hardware that can convert a signal from a computer (HDMI for example) and send it to the wall if you want to build a large wall out of many of those panels.
you can find this hardware on aliexpress pretty easily… search for “led wall sender” and down the rabbit hole you go. its not for the faint of heart…