yes and yes

No, but that's what it says in the description

There is a usb-c port. I connect my PC to an adapter to connect a screen, keyboard and mouse.

According to our supplier data, the device actually has no OS, the correction has been requested

Often our purchase price is also different for each configuration; for our system / our suppliers, each version is a separate product, so to speak. Unfortunately, this can mean that although we charge the same margin, the final sales price is lower or higher than other keyboard layouts.

German QWERTY keyboard!