The SONOS Sub 4 Wireless Subwoofer in black is a brand new sealed product designed for Sonos compatibility. With a driver size of 6 inches and a rectangular shape, this high-end and compact subwoofer offers Dolby Atmos surround sound formats and is smart home compatible with Alexa and Google Assistant. It delivers 10W RMS power with wireless, Bluetooth, and Wi-Fi connectivity, making it a versatile and powerful addition to your home audio system, perfect for enhancing your listening experience.