Unfortunately, this is not a Bluetooth keyboard, which is why a (very small) wireless adapter is necessary. This is included, but it takes up a USB slot. I have a total of 3 of these keyboards because I find them extremely successful (office, home office and private).
If you absolutely don't want to give up a USB slot, it should be a keyboard with Bluetooth. You can easily enter this in the filter at digitec:
https://www.digitec.ch/de...
I hope I was able to help you.