XtremeMac?s Tango Bar speaker let?s you enjoy audio from the computer like never before with cutting edge technology that delivers twice the output power of most traditional USB speakers. There is a six speaker configuration with dual dome tweeters, midrange drivers and passive radiators. Tango Bar?s single USB connection for both power and audio can connect to any computer or wall charger USB port. The simple plug and play USB connection cleans up any workstation area by reducing cord clutter. Additional connections include a headphone output and line-in jack for personal listening or use with MP3 devices as well as an optional sub-out port.