The Logitech Multimedia Subwoofer LS21 is a sleek black rectangular subwoofer designed for a 2.1 channel desktop computer speaker system. Made of plastic and wood, this wired unit features a 3.5mm jack audio input and is compatible with the Logitech LS21 model. With a weight of 3 lbs, this subwoofer delivers enhanced audio quality and is a perfect addition to your computer speaker setup for a more immersive multimedia experience.