Cyber Acoustics 20 watt Booming 2.1 Powered Speaker System with Subwoofer (CA-3488) Convenient satellite-located controls : on/off switch, master volume, bass volume control 10w subwoofer provides excellent, bass-filled audio making it perfect for movies and music Magnetically-shielded 5w satellite speakers provide clean, crisp sound Durable design; perfect for classrooms, dorm rooms, or the office