Class   Usage       Description     Examples, or exception
00h     Device      Unspecified[45] Device class is unspecified, interface descriptors
                                    are used to determine needed drivers
01h     Interface   Audio           Speaker, microphone, sound card, MIDI
02h     Both        Communications  Modem, Ethernet adapter, Wi-Fi adapter,
                    and CDC Control RS232 serial adapter. Used together with class 0Ah (below)