K8062 LibUSB accessing question

Is there any documentation on what the K8062 is expecting?
I would like to drive the DMX controller with my own software, i am using a Linux (Debian) with LibUSB,
but i can’t find any information on what the controller is expecting, i have seen some other projects with this controller.

this is sending RAW data to the device like [0x04, channel Index, channel Data, …]
but how do i know what it is accepting?
what is the 0x04 meaning?
what options are there to communicate with the C-language?