The Boston Acoustics BA745 Computer Speaker Subwoofer in black is a wired 2.1 channel subwoofer designed for universal compatibility. Made of plastic and featuring a cube shape, this subwoofer from the renowned Boston Acoustics brand offers a sleek and powerful audio solution for computer speakers. With a 3.5mm audio input, this subwoofer provides enhanced bass for improved sound quality, perfect for enhancing your desktop audio experience.