The Altec Lansing ACS54 2.1 Wired Computer Speaker System in black features a subwoofer with a 3.5mm jack audio input, perfect for enhancing your computer's sound quality. With a 2.1 channel system configuration and Dolby Digital surround sound formats, this speaker system delivers powerful audio with an RMS power of 40W. Its rectangular shape and wired connectivity make it easy to set up and use with your desktop or laptop for a high-quality listening experience. The Altec Lansing brand is known for producing reliable audio equipment, making this speaker system a great choice for anyone looking to improve their computer's sound system.