How to use Bradzilla 433mhz rf switch module?

Im super confused on how to even go about using it. Is there a video on this? Im mean on the receiver module node there isn’t even a port connection for the arduino board. How does this even work?

interrupt receiver, “D2” Arduino UNO , in node use “interrupt = 0”
Sending by “data pin” change number D3.

Thanks. I’m still lost on how to use it. Im too much of a noob at this stuff. I wish there was a video tutorial on this.