The Logitech Z-640 Dolby Digital Subwoofer is a powerful 140Watts accessory designed for enhancing sound quality in laptops and desktop computers. This original OEM-tested subwoofer, in sleek black color, is compatible with Logitech brand speakers and offers wired connectivity for easy setup. With its high-quality construction and brand reputation, the Logitech Z-640 subwoofer is a reliable choice for improving audio performance in your computer setup.