The Altec Lansing Amplified Speaker System Subwoofer Model VS-2121 is a portable speaker system designed for use with computers and tablets. It features a sleek black design and offers wired connectivity for easy setup. The Altec Lansing brand is known for producing high-quality audio equipment, making this subwoofer a reliable choice for enhancing your computer's sound system. The Model VS-2121 has been tested and is a great addition for anyone looking to improve their computer's audio capabilities.