3.1.2 channel sound, including dual up-firing channels, let you experience truly immersive sound Dolby Atmos offers an immersive sound experience Wireless subwoofer produces crystal clear bass and sub-bass tones Q-Symphony orchestrates your TV and soundbar in harmony Ultra slim design ensures this soundbar will fit virtually anywhere you want to put it Required accessories (sold separately) HDMI or optical digital cable, depending on how you're connecting the sound bar to the TV