The LG Wireless Active Subwoofer SPH4B-W is a rectangular black subwoofer designed for LG brand audio systems. With a 10-inch driver size and Dolby Digital surround sound formats, it offers powerful bass enhancement for an immersive audio experience. The subwoofer is compatible with universal LG audio models and features smart home compatibility with Alexa. It is equipped with digital optical TOSLINK audio inputs and wireless connectivity options like Bluetooth and WiFi. Made by LG, this unit comes with a 1-year manufacturer warranty and weighs 6 lbs. It is perfect for enhancing your audio setup with its impressive sound quality and convenience features.