The specific JSON link for the game version you want, often sourced from libraries like OrbisPatches
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To trigger a revert, you generally cannot just click a button. It requires soldering to the console’s Syscon (System Controller) and NOR flash chips. The specific JSON link for the game version
Most are simply exploit host devices —a pre-configured Raspberry Pi Zero or ESP32-S2 that automates the jailbreak process for firmware 9.00. They do not downgrade your firmware. If you are on 11.00, plugging this in will do nothing. They are useful only for consoles already on 9.00 to avoid using a computer. ps4 downgrade tool