Ah, no, these can connect to a PC over USB and to a smart phone over USB or NFC to generate a 6 digit TOTP code, just like Google Authenticator does.

They can also do more sophisticated things, but that's not what I was referring to here. Those sophisticated and more secure things are supported by Google, Facebook, Dropbox, Github, etc, but not by most banks. Banks are so slow with this stuff and still do SMS-based 2FA which is absurd to me.