How do I use this brute forcing tool?

First off I am new to the forum and I am currently waiting on my flipper zero to arrive, but I am wondering how this would work, so there is this “SubGHz Bruteforcer Plugin for Flipper Zero” or they called it a “subghz fuzzer”,
anyway my question is when I have the files in the flipper, how would I go about brute-forcing lets say a key a card reader to get into a building cause I forgot my card at home, I have no experience in this stuff so im asking can someone explain in SIMPLE TERMS what file would I press and how would it work?

here check out the plugin: GitHub - derskythe/flipperzero-subbrute at f47f826a689a94ea1b554743dd87ae0fb836427b