This is really great firmware on the controller which you fully configure using Opensource (originally created by Shantea Controls). You can configure the controller via an online configurator or download an app on your laptop. You can even configure it on you Android Phone or Android tablet as they support the Web Midi protocol via Chrome! See for a demo
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The controller will be fully configured before sending it to you so you can directly use it, but if you want to configure it later yourself then make sure to check out all configuration options on https://beatsandbuttons.com/2023/03/01/use-the-ope... (Beats & Buttons is a Eurorackworld brand).