The Vizio Silver/Black Wireless 5.1-Ch Home Theater System SB4051-C0 Subwoofer is a compact and wireless unit designed for Vizio brand compatibility. Made of plastic, this subwoofer boasts a sleek black color and a cube shape, perfect for blending seamlessly into any home audio setup. With wireless connectivity and no manufacturer warranty, this model offers convenience and simplicity for enhancing your home theater experience.