The Sonos Sub 3rd Gen. Wireless Subwoofer in Matte Black is a rectangular-shaped subwoofer designed to enhance the sound quality of your home audio system. With wireless connectivity and WiFi features, this Sonos subwoofer is easy to set up and use, providing deep and powerful bass for a more immersive listening experience. Backed by a 1-year manufacturer warranty, this sleek black subwoofer is specifically designed to work seamlessly with other Sonos products, offering a seamless audio experience throughout your home.