The Vizio SWA16 Subwoofer is a sleek and powerful addition to your home audio system, designed specifically for the Vizio SB3821-D6 model. This black cubed subwoofer offers wireless Bluetooth connectivity, allowing for easy integration with your existing setup. Made of durable plastic, this subwoofer delivers deep and impactful bass to enhance your listening experience, making it the perfect choice for anyone looking to elevate their home audio.