The Smart Soundbar is similar in many ways to the Smart Soundbar 600, but has A.I. Dialogue Mode that automatically senses when dialogue is occurring and adjusts the tonal balance to improve the clarity of spoken words in all content without sacrificing immersive elements and effects. It also has the Personal Surround feature, which allows you to pair the Bose Ultra Open Earbuds with your soundbar to add new dimension to your films and TV. Acting as rear surround speakers, the open earbuds add an immersive layer to the dynamic audio your soundbar delivers.