it has a USB Dongle. Microsoft does not make them anymore themselves for some years now. You can only buy third party models.
OK, thanks. 
That’s what I assumed, it’s a shame to have to use an extra dongle. Unfortunately, I believe this is the case with all small “Chinese” keyboards, which use a proprietary protocol and are not recognized by bluetooth. It’s the same on PC, I own also an “iPazzPort” mini-keyboard, and it required a specific dongle 
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For the Xbox controller, yes, indeed the original chatpad cannot be found and no longer seems to be manufactured.