The SONY SS-TSB105 Surround Sound Speaker is a compact, black rectangular speaker with a 4-inch driver size and 2.0 channel system configuration. It is made of plastic and features Dolby Digital surround sound formats, providing an immersive audio experience. With a power output of 105W RMS and an impedance of 8 Ohms, this Sony speaker is designed for wired connectivity and is compatible with the SS-TSB105 model. Perfect for enhancing your home audio experience, this surround sound speaker from Sony delivers high-quality sound in a sleek and easy-to-use package.