Neither of the videos I’ve seen for the Libra 2 (which I presume would ship with the same cable) explicitly mention what the cable is, but in this one she does show it plugged in to a computer and I’d have to guess it’s USB C to USB C. She might mention it but I don’t speak her language and the captions never show USB which I’d assume is going to be the term used regardless of language.
https://www.youtube.com/watch?v=rIe1OpAzIYU&t=4s
There’s another one where it almost looks like the guy is going to do a proper unboxing but stops at the Libra 2.