Questions about Deltaco Gaming DM220

Hello..yes there is one.

I don't know, but everything works without an app and my motto is if something works without an additional app, it can stay stolen from me.

Yes, there is software for the mouse that allows you to customise settings such as DPI, RGB lighting and macros. This software can be downloaded from the manufacturer's official website.

Yes, you can switch off the RGB lighting. To do this, you can use the power switch on the underside of the mouse to switch off the LEDs. Alternatively, you can also press the LED mode button to navigate through different lighting modes, including a mode that switches off the LEDs.

very loud?

Unfortunately no experience either... Also used on a laptop! There it is top!