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USB B
— a connector for connecting speakers to a computer's USB port — primarily for transmitting sound, although additional functions can be implemented through such a connection (powering the speakers, managing their settings). Such acoustics can be used even on computers that do not have a sound card at all; and if it is available, USB speakers do not occupy audio connectors, which can be useful in some cases (for example, if these connectors are needed for another set of acoustics or for special audio equipment).